When manufacturing blow molded bottles intended for food and beverage, industrial chemical and personal care markets, issues managing pearlescence and haze can lead to costly delays and disruptions – including unwanted downtime, higher scrap rates and quality concerns.
Pearlescence, also known as stress whitening, causes a milky coating in the bottle and is often caused because the production temperature is too cold.
Haze, thermally induced crystallization on the exterior of the bottle, is often caused because of overheating.
Common causes of pearlesence and haze occur during processing.
Questions to ask before and during production include:
To prevent pearlescence and haze, consider the following:
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