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frequently asked questions for manual mold silicone rubber
what should we do when the air bubbles appeared in the process of mold making ?
to handle this situation depends on different cases. under the condition of an available vacuum pumping machine, mix the silicon rubber and curing agent evenly and then take it to vacuum chamber to deair . if without a vacuum pumping machine, reduce the amount of the curing agent properly. for example, change the mixing ratio of the silicon rubber and the curing agent from former 4 Percent to 1 Percent-2 Percent. in this way, the pre- crosslinking time of silicon rubber will slow down, so the air in the mold will be eliminated gradually to reduce the air bubbles.
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