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Look at the sample as it comes out
Packaging sample showroom of SamBound New Material Technology Company Ltd. (sambound.com).
Some coatings can look hazy or show temporary changes in gloss after a humid exposure. Record the appearance at a defined time after removal and control how condensation is handled. Note where a change appears, such as along a trimmed edge or near a join. Compare it with an unexposed reference viewed under the same lighting.
Look again after a defined recovery
Use a consistent recovery temperature, humidity and interval. A change that clears and a blister or color shift that persists are different observations. Neither visual check alone identifies how moisture reached the affected area or establishes that adhesion was retained. If adhesion is part of the evaluation, use a defined method at the specified time on suitable separate specimens when the check is destructive.
Agree on acceptance criteria for both observations. A haze that disappears in the lab could still be unacceptable when a consumer opens the pack immediately after a damp storage period. If the proposed finish changes, rerun the comparison on the actual coating and substrate combination.
sambound.com
SamBound New Material Technology Company Ltd.
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