Enroll at any time.

Participants will test in accordance with TAPPI T543.

Sample Description: Two similar samples, each containing ten pre-conditioned 4.25" by 5.5" sheets of printing paper. Samples range from 100–400 Gurley Units throughout the year.

Samples ship every other month for a total of six shipments beginning with the earliest available cycle of testing. Testing is conducted during February, April, June, August, October, and December, with samples for each test cycle shipping in the month prior.

This test is included on CTS' Scope of Accreditation to ISO/IEC 17043.