TAPPI T 437 OM 2012

Official TAPPI test method for visually estimating dirt in paper and paperboard using equivalent black area.

TAPPI T 437 om-12 provides a standardized visual inspection procedure for estimating dirt in paper and paperboard as equivalent black area. This five-page PDF covers scope, definitions, significance, required apparatus, specimen preparation, examination procedures, calculations, reporting requirements, precision, keywords, related methods, and references. It is intended for paper and paperboard quality control, laboratory testing, manufacturing process evaluation, and research applications.

Application Scope: Use for visual evaluation of embedded dirt, specks, shives, and related surface contaminants in paper and paperboard using reflected light and the TAPPI Dirt Estimation Chart.