Friday, December 11, 2015

How do I remove or minimize bubbles in ComposiMold?


ComposiMold's frequently asked questions of the week. 

How do I remove or minimize bubbles in ComposiMold?

 Getting a clean mold is as easy as spraying a heavy coat of bubble buster on the master object and then pouring the ComposiMold. This will give you a nice clean mold most of the time.

If you are super picky about bubbles, you have a stubborn part that tends to hold bubbles around it, or if you want to remove bubbles from the ComposiMold, we have multiple solutions to do just that!

  • Wait until the material has cooled to roughly 140 F (65 Celsius) before pouring. The closer your object and the ComposiMold are to the same temperature the less likely your part will hold bubbles close to it. You can even heat up your part if practical (don't get it to hot).
  •  Spray a heavy coat of bubble buster on your master object right before pouring ComposiMold (while the bubble buster is still wet). Bubble Buster breaks surface tension allowing bubbles to rise to the surface.
  • Heat the ComposiMold with a loose microwave safe lid on your microwave safe container (this helps remove surface bubbles).
  • In the microwave - heat the ComposiMold in short intervals. Also, let the ComposiMold sit to allow the hot melted portions to melt the non-melted portions. Do not let the material get above 200 F (90 C) the material will start to boil creating bubbles. Do your best to keep it below 180F (80 Celsius).

Do Not boil the ComposiMold like this
  • Pour the mold in one spot and allow the material to rise over the part like you would with silicone.
Pouring ComposiMold
  • To remove bubbles from the material - maintain a temperature of roughly 170 F (75 Celsius) until the bubbles have risen out of the material. This can be most easily accomplished in a double boiler.
  • You can also use a vacuum chamber to remove bubble from the material - use a heated vacuum chamber maintaining a temperature of roughly 170 F (75 Celsius) until the bubbles have risen out. Doing it in a vacuum accomplishes the same thing as maintaining the temperature as stated above. The vacuum just helps the bubbles rise a little faster.
Please let us know what questions you have, and thank you!

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