TAPPI T502 CM 2007

A five-page TAPPI test method for determining the equilibrium relative humidity of paper and paperboard.

TAPPI T 502 cm-07 provides procedures for measuring the equilibrium relative humidity of paper and paperboard under controlled temperature conditions. The method covers applicable sensing devices, calibration and verification, sampling, specimen handling, test procedures for stacks, rolls, sheets, and special products, reporting requirements, precision information, and apparatus performance requirements. This PDF edition was revised in 2007 and is intended for laboratories, paper manufacturers, printers, converters, and quality professionals who need a standardized approach to humidity-related paper testing.

Application Scope: Suitable for evaluating equilibrium relative humidity in paper and paperboard materials, including sheeted paper, rolls, packages, and special products in laboratory, manufacturing, warehouse, and shipping environments.