The coupons were received from the client. Two contaminants were applied to the coupons with a foam swab. One agent, Crystal 4000, was applied to the black coupon and the other contaminant, Chem Trend CT 2004, was applied to the beige coupon. Cleaning took place in an agitated wash with a 10% concentration in a beaker for fifteen minutes at 139 F. Then the coupons were rinsed in tap water for ten seconds at 146 F. A two-stage drying was used. First the parts were passed under an air knife for two minutes at ambient conditions. After the parts cooled in a desiccator to room temperature, they were inspected visually for cleanliness.
SUBSTRATE MATERIAL: Acrylate polymer coupons
CONTAMINANTS: Silicone mold release agents
CONTAMINATING PROCESS USED: Applied contaminants with foam brush swab.