BUBBLes Problem
The following are some of the most common causes of bubbles:
Air inclusion during mixing the resin and hardener together.
Air trapped in moulds.
Air trapped due to improper casting/moulding techniques.
Air introduced by suction as the material shrinks or due to a leaking tool.
Trapped residual solvent vapors from certain types of mould releases.
Volatile components being stripped out of the materials while casting under vacuum.
Gases generated during the reaction (hardening) process.
Gases formed during improper storage (moisture contamination etc.)
Gases introduced through pressurized systems.
Air from improperly de-aired resin and/or hardener