The Parker Print Surf tester was one of the first roughness testers that featured both quick test results and a digital display. Since it had those desired features, it showed up in applications where test conditions had no relevance to the nip loading for which the PPS was designed. The PPS loading was designed to replicate the conditions of offset, gravure, and letterpress printing processes; where the operator could select 0.5 mPa, 1.0 mPa or 2.0 mPa loading. The theory was that paper under test should be subjected to the same compression loads found in a printing process.
Related posts include information on the relationship between paper roughness (smoothness) and the following items:
- Papermaking Process
- Printing processes
- Parker Print Surf Test
- Sheffield Test