Quality Control for Injection Molding Reply

In plastics processing injection molding is the most common method of part manufacturing. The variety of molded parts produced by injection molding extends from smallest components like cell phone buttons up to entire body panels of cars. Plastic moldings are manufactured in production batches of up to several million. In addition to dimensional stability, color and gloss are the decisive quality criteria.


Why are color consistent charts needed for routine QC testing of opacity? Reply

Drawdown of paint sample.  Photo courtesy of BYK-Gardner.

Drawdown of paint sample on an opacity chart.
Photo courtesy of BYK-Gardner.

Opacity is an important property of architectural paint. One coat hiding reduces labor costs of a paint job and is a competitive edge in promoting paints to professionals.