What causes bubbles in putty powder with HPMC?

2026-03-09

Bubbles are usually caused by: 1) too fast mixing trapping air; 2) lack of defoamer; 3) HPMC dissolving too quickly on the surface, sealing air inside. Slowing mixing speed or adding defoamer helps.

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What causes bubbles in putty powder with HPMC?

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