Sunday, January 8, 2017

Plastic Casting and Rubber Casting

Here we describe the plastics and rubbers as basic types of material to use as a casting material:

Plastic casting parts
Plastic parts cast in molds
 Rubber or elastomeric: Rubbers range from super soft to hard, almost like plastic. The hardness are ranked from Shore OO-5, very soft like a rubber fishing lure to Shore A to Shore D of 80 or 90, which is hard like a skateboard wheel.  Rubbers can be silicones, urethanes (also called polyurethanes), latex, PVC based, and others. The two recommended for most castings is urethane rubber or silicone rubber, and there are a lot of different options based upon the other properties you are looking for such as amount of elongation, strength (typically listed as tensile strength), tear strength (how easy it is to rip after a rip has started), color and feel, and how easy it is to make.  Thermoset resins require mixing two parts together and depending on the resin, this ratio will be different. If the instructions for a particular resin do not say specifically, they are typically mixed by weight, although many will give the mixture ratio as both by weight and volume. Each one of those rubbers will be discussed in future blog posts.
Rubber casting of an X, made with silicone rubber 

Plastic: we hear a lot of people ask for plastic that acts like the plastic of an Army soldier.  Army soldiers that you buy are made from thermoplastic resins, but you will likely be casting with thermoset resins. The difference is thermoplastics are melted into a thick goo and squeezed into the molds. Whereas the thermosets are two part resins that are mixed together as a liquid (or paste) and poured into your molds. It’s a lot easier to make your own castings with thermosets because it can be poured. Thermosets, after they are cured, cannot be re-shaped.  Thermosets can have very similar properties as compared to thermoplastics.
Different types of plastics include urethanes, epoxies, polyesters, vinyl esters, and others. For home or small industrial, the main plastic resins are epoxies and urethanes. Polyesters are much cheaper, but the smell and toxicity are extremely detrimental. It is also more complicated to use.

Rubber Casting Material

“Exotherm” of a Casting Material is the heat of reaction produced as a resin or rubber cures. If the casting is thin then heat is easily dissipated in the mold, but thicker pieces will create more heat. To compensate, large pieces can be poured in intervals or add fillers to the casting material.

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Monday, December 26, 2016

5 Mold Making Techniques to Rule to World

How to Use Different Mold Making Methods
How to Use Different Mold Making Methods
The purpose of mold making is to duplicate your creations either in the same material the original is made in or into another material. But first you have to make your mold. The mold making process is very versatile, so you can choose how you do it based upon what your master object is shaped like. Typically, you don’t want to make your mold any more complicated than you need. Here are 5 techniques that can be used:
1.       Pour Block mold method: This is the go-to method. Because ComposiMold is clear. You can always make it into a cut block mold. The technique is a simple: place your master into a mold box and pour ComposiMold over it. It gives you a sense of what the mold will look like, and you can always re-melt it and make it a different way.  If your part is lightweight and will float in water, hot glue it to the bottom of the container.

Pour Block Mold Making Technique
Pour Block Mold Making Technique
2.       Cut block mold: Almost as easy as the pour block method. Make a pour block method and then cut out your master where you want the parting line to be. Because ComposiMold is a clear rubber that you can cut with scissors or a knife, we just pour it over the part, allow the ComposiMold to cool, and cut the mold in half. Sounds easy, and for the most part it is. You will still have to worry about where to make the parting line and keeping the part together while casting the new piece. There is no reason why more complex molds with three or pieces cannot be made using this same techniques.
 Cut Block Mold Making Method for Chocolate Molds
3.     The Press Mold: With ImPRESSive Putty, just press your Putty over the part you are molding. The nice part about the rubber molding putty is that you don’t need a mold box. However, you will lose a little detail on the corners.
Press Molds Technique

Press Molding Technique
 The Brush-on Mold or Paint on Mold: Paint-on molds are made by painting the molding material directly onto a model’s surface. The advantages of a paint-on mold are that it is possible to use less material and you can mold parts that you could not do with a typical molding process. An example where you may need to use a Paint-on mold is making a mold of something attached to a wall.

5.       2 Part Mold Making Method: In many cases, it is best to prepare the mold in two parts. This may be because there are specific undercuts that you need to mold around, you want to make a parting line that is not straight, or you want a three part mold. The two part mold is well suited for dramatic undercuts that would leave spaces or voids in your mold. Use clay or polymer clay to build up around the figurine. Build up the area to the point where you want the parting line in the mold. This parting line is selected to allow the mold to be separated easily. After the clay is completed, lightly cover the master part and clay with a mold release. Pour ComposiMold over the Master and clay to make the first half of your mold. When the ComposiMold has solidified, pull off the first half of the mold, flip your Master and pour ComposiMold over the part again being sure to have mold release in between the layers, and in larger molds chill your first ComposiMold half before pouring the second. After the second ComposiMold half has solidified, pull it off of the Master. Pull out the Master part from the mold. You are now ready to make your casting.

Two Part Molds Mold Making Techniques
Two Part Molds Mold Making Techniques

For a much more in depth methodology, please download your copy of the “Setting You Up For Mold Making and Casting Success” at

Mold Making Techniques
Mold Making Techniques

Wednesday, December 14, 2016

Urethane Resin Casting for Awesome Molds

Use either ComposiMold or ImPressive Putty for Urethane castings.

Many people use urethane resins because of their versatility and relatively simple use. Most urethane casting materials are 1:1 mixes with short casting times ranging from 1 to 30 minutes. Urethane plastics are used for making models, prototypes, crafts, and art pieces. 
Polyurethane resin casting in ComposiMold

Urethane resin in ImPRESSive Putty

Quick tip for success with urethane casting resins and ComposiMold:
With ImPRESSive Putty, faster cure urethane casting resins work really well. The mold making putty can handle the higher temperatures of the fast cure urethanes. 

For ComposiMold, choose a urethane with a longer cure time. These create less heat as they cure. You can also experiment with freezing the mold prior to pouring higher temperature urethane resins. Be sure to use talc powder/baby powder as your mold release before each casting made.

ComposiMold works very well with many urethane resins. However, there are two potential issues with some urethanes:
  • Some fast cure urethanes create a lot of heat when they cure, which can melt the ComposiMold. You can work around this by chilling your mold first, adding fillers into the urethane before casting, or pouring the resin in intervals.
  • Some urethanes are very sensitive to moisture. Use talcum powder as a mold release to reduce any moisture from the mold from reacting with the urethane.
  • Use a mold release that is designed for polyurethane casting.

ComposiMold has two urethane resins available that we believe work very well with ComposiMold:

Urethane resins require dry fillers. Any water will create bubbles and heat. If you using powdered fillers in the polyurethane, dry the material in the oven at low temperatures for 15 to 30 minutes prior to mixing. 
Pouring ComposiMold mold for resin casting

Making wheels from Urethane resin in ComposiMold mold

Visit Polyurethane Casting with ComposiMold for videos.

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Friday, November 18, 2016

Composi-Seal for Composites: Seal Leaks in Vacuum Bags and Even Replace Vacuum Bag Tape

Composi-Seal is a pourable, re-usable sealant material that is designed to stop leaks in bagging films or molds. In many instances Composi-Seal can also replace your vacuum tape and save you money. It's a biodegradable thermoplastic polymer that is re-meltable so you can re-use it as many times as you want.


  • Re-usable, User friendly;  Easy to apply by hand
  • Works for Room temperature to 120°F  cure cycles
  • Strips clean from various tool surfaces
  • Excellent adhesion to nylon films and tool surfaces
  • Non-hazardous, water soluble for easy clean-up
  • Seals broken bags
  • Cool to solidify and seal the leaks. At room temperature, it should solidify within minutes.

  • Melt in the microwave for 30 second intervals.  2 oz. sample will be melted in 30 seconds.
  • Use brush or a squeeze bottle to make a line of Composi-Seal around your vacuum bag
  • Press vacuum bag together to seal
  • Use a heat gun to re-melt to fill any leaks or cracks.
  • When finished, pull the Composi-Seal off your bag and re-melt to re-use on your next composites project.
  • 20 oz. and 40 oz. sizes come in a microwave safe deli container.
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Thursday, October 27, 2016

Keith Pruitt of Hobby Merchandiser Magazine Writes Great Article Highlighting ComposiMold's Reusability

Keith Pruitt, writer for Hobby Merchandiser Magazine, explores the ComposiMold line of Mold Making Materials and hits the re-usable nail on the head!

"Quite often, more experienced modelers will scratch-build parts or assemblies, and when they need duplicates, they will cast them in resin to use for one or more projects. While silicone and latex materials are the most common molding material, they do have some drawbacks. Once a mold is created, it cannot be altered and the slightest flaw will show in the finished, potentially malformed, parts. Since that mold would be cast aside or thrown away, casting begins to become cost-prohibitive as new materials must be used for each mold. Because ComposiMold products are designed to be used multiple times, simply by melting the mold and going through the mold-making process again, molds can be recreated time and again until an accurate and acceptable version is ready for casting. With only the needed amount used each time, and the possibility of melting and reusing the material, there is no waste." Keith Pruitt

Download the entire article here.

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Tuesday, October 18, 2016

Make a Chocolate High Heel Shoe with ComposiMold Flex and Dark Chocolate

Chocolate high heels are the new black leather high heels. We'll show you how to use ComposiMold-Flex to make a mold of a decorative heel to then cast in dark chocolate. The ComposiMold-Flex makes it so easy to de-mold your delicate chocolate high heel without breaking it.

Amazing on any wedding cake.

Thursday, October 13, 2016

Missing Checker Pieces No Problem with ImPRESSive Putty and Urethane Res...

Your game was about to were about to crush your openent at checkers or  chess or monopoly or...but wait! You're missing a piece! What do you do? How do you survive?

With ImPRESSive Putty of course. You just happen to have this cool re-usable mold making putty in your tool chest waiting for this day. Your dream is finally here. You will be the game maker you have always wanted to be!

ImPRESSive Putty is a super easy duplicating material that works by PRESSing your object into it to make a mold making indentation that you then fill with a casting material. The  casting material can range from wax, to plastic, to epoxy, to Epoxy Putty, and more...

The video below shows how we did it: how to duplicate your checker pieces.

And when you are finished, not only can you finish that rainy day activity, you can re-melt and re-use the ImPRESSive Putty for your next mold making project. What will you make?

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Thursday, October 6, 2016

Make Your Own Plastic Action Figure with ComposiMold This video demonstrates just how easy it is to use your existing action figures to make more action figures! Use ComposiMold to make flexible rubber molds of action figures. THEN RE-MELT THE MOLD TO RE-USE!

Link to the video: 

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Wednesday, September 7, 2016

Brush On/Pour On Method for Making Molds of Relief Sculptures

Could making a mold with ComposiMold get any easier?! Why, yes it could. We'll show you how to make a mold of a relief sculpture (flat shape) by just pouring or brushing melted ComposiMold onto it without even using a mold box.

ComposiMold-Food Contact
Relief Sculpture
Edible Paints

1. Place your clean relief sculpture on a surface that ComposiMold can easily be peeled away from. In this example we use a piece of glass. (Paper surfaces are not ideal)

2. Melt your ComposiMold-FC in the microwave per the instructions included in the container. 

3. Pour a thin layer of CM-FC over the object. Be sure it covers the entire surface including the edges. 

4. Look closely for any bubbles that may have been trapped on the surface of your original object. Use a toothpick to pull the bubbles off the surface. You don't need to pop them or try to completely remove them, just be sure they are not touching the surface of the relief sculpture. 

5. Let the 1st layer cool until firm to the touch again. A thin layer such as this took less than 20 mins to cool. 

6. Pour your next layer over the first. This layer adds firmness and strength to your mold. All the detail was captured in the first layer. Be sure the entire thickness of the mold is at least 1/4" to 1/2".

7. Let this layer cool. 

8. Peel the ComposiMold-FC mold off of the original piece and flip it over onto a flat clean surface. 

9. Soften the fondant of your choice, roll to 1/8", and transfer to your mold. Press into all the details and edges of the mold. 

10. Rub excess fondant away from the edges of the final fondant piece to cut the extra away. (See video)

11. Then gently roll the final edges back towards the final fondant piece to make them neat when the piece is flipped over. 

12. Carefully flip the mold and fondant over. Then lift one edge of the mold back and away from the fondant. Slowly bend/peel the mold away from the fondant to reveal your edible creation. 

13. Paint and decorate the fondant shape with edible materials. Wrap it around the side of a cake, drape over a cupcake, or showcase it on its own!

14. Make as many fondant creations as you need or pour melted chocolate into your mold to make a different version. 

15. Wipe away any fondant or chocolate from the mold with a cold damp cloth, re-melt the ComposiMold, and store covered until your next project. 

Here is a link to a video tutorial of the same project:

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Tuesday, August 9, 2016

Ten Most Compatible Casting Materials with ComposiMold

Here are some quick tips for the variety of casting materials you can use in a ComposiMold mold:
EPOXIES: Epoxy Resins, Putty, or Clay
Epoxies work well for pieces up to 8 cubic inches. For larger castings of 8+ cubic inches, choose epoxies with longer cure times of 24+ hours. Experiment with freezing the mold prior to pouring epoxy resins that create a lot of heat during curing. Epoxy resins that require an added heat source for curing are not recommended.

Try our jewelry grade, crystal clear, Clear Casting Plastic for castings up to 6 cubic inches. Chill the mold for castings up to 20 cubic inches.

Choose a urethane with a longer cure time. These create less heat as they cure. You can also experiment with freezing the mold prior to pouring higher temperature urethane resins. Be sure to use talc powder/baby powder as your mold release before each casting made.

Silicones work great in ComposiMold molds. Make castings with both platinum or tin cured silicone rubbers.

Mix plaster and water together in a 72 parts plaster to 28 parts water, by weight, or to a toothpaste-like consistency. Traditional plasters cure well but leave a slight soft layer on the outside of the casting. To avoid this, apply a layer of Plaster Release to the mold before pouring casts. Fast curing masonry cements work great and cure extremely strong. Follow instructions for mixing ratios.

Try our ComposiStone formulation! It’s smooth like plaster but hard as concrete. It works very well in a ComposiMold mold.

Shea Butter and Glycerine Soap make great soaps! Chill the mold prior to pouring any higher temperature soaps (above 140ºF).

WAXES: (for candle molds or encaustic casting)
Soy, Paraffin, Beeswax, and Melted Crayons work really well. Chill the mold first for higher temperature waxes (above 140ºF).

Try our all natural Soy Candle Wax for candle making and beautiful wax castings. Cools to a white, creamy finish!

Use any type of polymer clay, modeling clay, putty, or real clay for push molding in a ComposiMold. Do not use clay in a slurry form or the water will degrade the mold.

Pour or pipe many types of melted chocolate into your mold. Lightly tap or vibrate the mold to release air bubbles in the chocolate. No mold release is necessary for chocolates.

Press softened fondant into your mold with your hands or a rolling pin and remove immediately. No mold release is necessary for fondant.

When casting edible treats, you can also use: no-rise cookie dough recipes, gummies, gum paste, ice, butter, and more!

For your art, craft, hobby, and hardware projects, you can also try: adding fillers and dyes to casting materials, ComposiMold itself as a rubber casting material, Modeling Compounds, Polyester Resin, Paper Mache and many more!

Do you have a question about using a specific casting material that was not answered here? Email or call anytime!

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Sunday, July 31, 2016

How to Make 3-D Art with Encaustic Wax Paint

See the latest example of 3-D art with ImPRESSive Putty:

An amazing artist uses 2,300 year old art methods to create three dimensional works of art.

The method was first developed by the Egyptians in 3rd century B.C. But Helene Farrar has added a contemporary twist, using modern materials.

The material is Encaustic paint. Part painting, part wax. Encaustic paintings are made from beeswax with pigments.

Helene Farrar has taking the encaustic paint and created relief sculptures that pop out of the page and combines this with her painting.

Instead of painting an image, she builds the image.

Using basic mold making methods and ImPRESSive Putty, she copies areas from sculptures and found objects for use in her paintings.

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Friday, July 1, 2016

Mold Making Material Tools for Making What You Want

Our goal: Give people the tools to duplicate anything and make what you want.

How do we accomplish this? With the easiest mold making materials available.

Impressive Putty: heat, press, and let cool. Yes. It is that easy. No mold box needed. No mold release needed for plastics, resins, low melt metals, or ComposiStone. Use our Plaster Release for plaster mold making.

ComposiMold: heat, pour, and let cool. You will need a mold box (typically a cup or bowl. Use vegetable oil mold release.

All ComposiMold mold making products are re-usable. They will be there when you need them! Use them today, tomorrow, or next year. Your molds will be ready to use. You can also keep your molds if you want to by placing them in a press-n-seal bag and keeping them in a cool place.

When do you use ComposiMold? When you want great detail, flexible rubber molds. When you want to learn how to make molds without wasting money. When you want a mold making material that will always be available to you.

When do you use ImPRESSive Putty? When you want super easy-to-make molds. When you want higher melting point than ComposiMold. When you want to make molds that can’t be done in a mold box such as on a wall, statue, or upside down.

The 10oz. ComposiMold should be melted in 30 second intervals until completely melted. I have attached the heating instructions from the ComposiMold containers.

ComposiMold is certified to last 35 times or more. The material will last 50+ times if the user is careful  to avoid overheating the ComposiMold (heat slowly in short intervals). When ComposiMold is at the end of its life the master part will not release from the mold and instead the mold will break apart. However this is also a sign that the mold is to warm and has not been allowed enough time to cool.  Cooling times depend on the surrounding temperature and the size of the mold, 10oz. will take about 30 minutes to cool in the typical freezer.

Any cooking oil or cooking spray will work as a mold release, such as pam cooking spray, olive oil canola oil, vegetable oil etc.. Avoid using too much mold release as it will create defects in the mold (wipe up any pooling or access).   

To wash, the mold should be rinsed with cold water and then heated immediately after in the microwave to evaporate the excess water. Do not use hot water or use it in a dishwasher (it will dissolve).  Cutting the mold into pieces seems to speed up the heating time but, it is not required or necessary.

10oz. of ComposiMold is 237ml and will cover an abject that is 9cm X 9cm X 2.5cm or similar.

Any ComposiMold can be used for food contact molds or non-food products. After used for non-food contact casting materials such as resin, plaster, concrete, silicone…, these products will contaminate the mold so that it will no longer be food safe.

When do you want to use silicone molds? When you want to spend more money on your molds. When you want a mold that can’t be re-melted and re-used. When you know you won’t want to make changes or want fix the mold if it breaks. Use silicone molds when you want to make an entirely new mold when the first one gets old. When you want a mold that will remain as rubber even after the mold has worn away. 

How about Latex mold making material? See silicone molds, plus when you want a smelly mold.

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Friday, June 17, 2016

ComposiMold Review

Here is a quick video showing some of the work our customers have made:

Thank you to everyone who has shared your amazing work.

Here’s the list in the order that they are displayed, and where we can, I’ve included a link. Check out the cool stuff:

Sarah Newsome
Bob’s Brigade
Cake Kakoots
Chuck Darnell
Diane Salyer
Judi Smith and Linda Fontana  
Heather Perry Work was part of her MFA from University of Maine Orono
John Murphy
Karen Christensen
Matt Wyatt
Shannon Green: see how she does it at:
Sharon Stiegler
Sue: she made the soaps as a fund raiser to support
Annika James

Wendy Lynn
Allison Freeman Mitchell…
Jean Coombs

Thank you to all of you!

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Friday, June 10, 2016

How to Replace Hard to Find Parts for Your Powerchute

See how we used ImPRESSive Putty to replace hard to find parts for a Powerchute.

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Tuesday, May 31, 2016

How to Make Butter Molds: Unique Buddha Butter Molds

Watch this video to see how you can make unique butter molds with ComposiMold.

The process is simple: just like you make chocolate molds, fondant molds, or gummy molds. Just melt the ComposiMold, pour it over your part, and you have your mold.

Imagine your pancakes with a cool shape, or a restaurant with its logo in butter!

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Tuesday, May 10, 2016

Custom Chocolate and Cookie Logos and Unique Chocolate Bar Shapes

Can't get these chocolate molds or cookie molds in a store...

Using sugar cookies and chocolate, you can make almost any food safe mold shape you want. Just print out your shape, cut it out of clay and make your molds. Molds that you make are much more creative!

Edible treats that are really easy to make!

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Wednesday, March 23, 2016

Make Edible Legos with Jello and ComposiMold-FC

Make a mold of your Lego bricks and then pour jello into them. They even stack together like real Legos! When you are done them!

Here are 3 tips to set you up for success when making jello castings in a ComposiMold mold!

TIP #1: Be sure to use 1/2 the amount of water asked for in the instructions. This will make a firmer jello Lego so it'll hold up to de-molding from your mold and lots of Lego stacking play!

TIP #2: Be sure to spray the inside of your ComposiMold mold with a food safe mold release before pouring the liquid jello.

TIP #3: Let the liquid jello cool way down before pouring. Also cool the mold before pouring liquid jello.

Let us know if you try this project! We'd love to hear about it and see pictures too!
~The ComposiMold Team

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Thursday, March 10, 2016

Turn Polymer Clay Pendants into Epoxy Resin Jewelry

Watch the video below to learn how to turn unique polymer clay pendants into epoxy resin jewelry. It's easy to do with ImPRESSive Putty, a re-usable mold making putty made by ComposiMold.

Follow these steps to make your own unique epoxy resin jewelry:
1. Sculpt polymer clay (Sculpey in this case) into the shape pendants you want. We used a cool pattern on a silver ring to press texture into the surface of the clay. We also carved into the surface with a sharp tool. Get creative with this step!

2. Bake the polymer clay per product instructions. 

3. Add Activator to the microwavable bag and melt the ImPRESSive Putty (formerly ReMold Putty) per instructions. For the 6oz. size, we used 2, 20sec. intervals until the Putty was dough-like with no hard clumps. 

4. Let the Putty cool for 10 minutes. It's too hot to handle right out of the microwave.

5. Once the Putty is cooled off enough to handle comfortably, knead it for 3-5 minutes. This incorporates all of the Activator and smooths out any lines in the Putty. 

6. Place Putty on a plate and press your hardened clay pendants into the Putty. Don't push them so far in that they touch the plate beneath the Putty. This would make your mold too thin.

7. Let the Putty cool until firm to the touch. This mold was placed in the freezer for 1 hr.

8. Remove the Putty from the freezer. You can now de-mold your clay pendants. Simply bend the Putty mold away from the clay pendants and pull them out of the mold. ImPRESSive! 

1. Pour Clear Casting Plastic Part A into a cup. Pour Clear Casting Plastic Part B in to a separate cup. Add epoxy resin colorant to Part A and mix before mixing the two parts together. We used Resin Obsession's dye for epoxy resin.

2. Thoroughly mix Part A with Part B. Stir slowly so you don't introduce any bubbles.

3. Slowly pour the epoxy mixture into the Putty mold. Try not to overflow so you'll have less to clean up after your castings cure.

4, Let your castings cure overnight.  

5. Remove the castings the same way you removed the pendants you molded. Bend the Putty mold away from the castings and easily pop them out. 

6. Drill holes for threading wire, jump rings, and chains through to make your one of a kind jewelry pieces. 

7. Make your pendants into earrings, necklaces, bracelets, and more! 

1. Re-Melt to Re-Use. Easy!

It's as simple as that! You too can make original epoxy resin pendants in any shape you can imagine. We'd love to know if you try this. Drop us a line and send photos!

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For More Information Visit: 

Tuesday, March 1, 2016

3D Printed Electronic Control Box Duplication: Making 3D Printing Afford...

How to Duplicate Your 3-D Printed Parts

Here's a detailed video on how we made a mold with ComposiMold using a 3D printed part as the original. This process saves money for 3D printing.

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Monday, December 28, 2015

Learn how to make a rubber hatchet using ComposiMold and Silicone.


How to make a Rubber Hatchet (Theater Props, Cosplay)

Step 1: Clean the Hatchet
Clean the hatchet using soap and water. Remove any dirt, dust, loose paint and rust.
Step 2: Embed the Hatchet into Clay
Embed the hatchet into clay so that half the hatchet is showing then create Key holes (indents) in the clay. The key holes help the two mold halves line up.

Step 3: Coat the Hatchet with Mold Release
Mold release will help keep the ComposiMold from sticking to the hatchet.
Step 4: Brush ComposiMold onto the Hatchet
Start with a thin layer of ComposiMold and continue to brush more layers as the ComposiMold cools and thickens. The mold should be at least 1/4 inch thick.
Step 5: Create the Mother Mold
Once the ComposiMold has solidified, mix a batch of plaster of Paris.
Soak cheesecloth into the Plaster of Paris, and place at least 5 even layers of the Plaster soaked cheese cloth onto the rubber ComposiMold mold.
Step 6: De-mold.
Once the Plaster has hardened it is time to de mold (The Plaster will harden after 3 hours). Remove the clay and the hatchet from the mold. Clean up the hatchet and the mold to prepare them for the second half of the mold.
Step 7: Create Keys in the Mother Mold
Create keys in the mother mold so that the two halves fit together perfectly.
I used nuts in this example and glued them down with plaster. This will create holes in the second half allowing them to line up correctly.
Step 8: Create the Second Half of the Mold.
Once the mold and hatchet are cleaned put them back together.
Coat the hatchet and mold with mold release, then brush on the ComposiMold. Make sure to chill the first half in the fridge or freezer for an hour before brushing on the ComposiMold. Also, make sure the melted ComposiMold is below 145 Fahrenheit before brushing it on. If these steps are not followed it is possible for the two halves to melt into each other.
Step 9: Create the Second Half Mother Mold
Lay saran wrap over the mold so that the Plaster doesn't stick to itself. Then do the same thing we did to create the first half of the mother mold.
Step 10: De-Mold
De-Mold once again removing the hatchet from the mold.
Step 11: Prepare the Mold for Casting
When casting with silicone you can paint the mold with resin dyes or oil based paints.
Step 12: Prepare the Silicone
Dye the silicone using resin dyes or oil based paint, then brush it onto the mold.
Step 13: Finnish Casting
Quickly put the two halves tightly together, then top the mold off with more silicone.
Step 14: De-Mold and Clean up
De-Mold the rubber hatchet (the silicone took 16 hours to cure) Clean off any extra paint. Enjoy! Use it as a stage prop, for Cosplay, or for pranking your friends.

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