The Paper Roughness & Porosity Tester measures surface roughness and air permeance according to industry standard methods. It makes it possible to meet this demand with accurate measurements to help control paper roughness. Achieving uniform ink coverage is essential to high-quality printing, and can only be achieved with a uniform paper surface.
- Two-sided Measurements
- Complete Roughness/Porosity Analysis
- Multiple Measurement Capability
- Selectable Reporting Units
- Dry Diaphragm Air Compressor
- NIST Traceable Laminar Flow Elements
- Barometric Pressure and Temperature Compensation
- PROFILE/Plus Automated Testing System Ready\
Features of Paper Roughness & Porosity Tester
Multiple Measurement Capability
The Paper Roughness & Porosity Tester is available with top-side roughness only, bottom-side roughness only, or top and bottom side roughness capability in one instrument. The air permeance measurement can be added to any configuration.
State of the art Measuring Heads
The unique three head design provides top and bottom roughness and air permeance measurements simultaneously. The Paper Roughness & Porosity Tester continuously monitors the zero flow rate to improve measurement accuracy for low porosity and/or very smooth grades. This provides a wide working range to test the quality of various types of paper and board, which simplifies measurement routines.
Continuous Monitoring of Zero Flow Rate
PROFILE/Plus Roughness & Porosity continuously monitors the zero flow rate to improve measurement accuracy for low porosity and/or very smooth grades. This provides a wide working range to test the quality of various types of paper and board, which simplifies measurement routines.
Barometric Pressure and Temperature Compensation
PROFILE/Plus Roughness & Porosity can compensate for local variations in Barometric pressure and Temperature due to the effects of changes in mill elevation and local environment. This feature enhances the repeatability of each instrument by ensuring that the measurement conditions remain stable.
NIST Traceable Laminar Flow Elements
NIST Traceable Laminar Flow elements for calibration devices gives improved measurement accuracy, reducing measurement uncertainty. The PROFILE/Plus Roughness & Porosity uses a dummy head system that does not require measurement head removal during calibration, so flow verification is fast and easy.
Dry Diaphragm Air Compressor
One of the most critical factors of air-leak roughness and porosity testing is to ensure that the air is of the highest quality and free from contaminants. The PROFILE/Plus Roughness & Porosity uses a Dry Diaphragm Air Compressor, which means that testing is always performed with Lab conditioned measurement air.
Applicable Testing Standards
Roughness – Bendtsen
- ISO 8791 - Paper and board — Determination of roughness/smoothness (air leak methods) — Part 2: Bendtsen method
- SCAN P21
- DIN 53108 - Testing of paper and board - Determination of roughness according to Bendtsen
- BS 4420 - Determination of the Bendtsen Roughness of Paper and Board
Roughness – Sheffield
- ISO 8791 - Determination of roughness/smoothness (air leak methods) — Part 1: General method
- TAPPI T538 - Roughness of Paper and Paperboard (Sheffield Method)
- Paptac D.29
Porosity - Gurley and Bendtsen
- ISO 5636 - Determination of air permeance (medium range) — Part 6: Oken method
- TAPPI T460 - Air resistance of paper (Gurley method), Test Method T 460 om-16
- SCAN P19
- Paptac D.14
- BS 2925 - Methods for determining the air permeability of paper
- DIN 53120 - Testing of paper and board - Determination of air permeance - Part 1: Medium rate of air permeance according to Bendtsen
Porosity – Sheffield
- ISO 5636/14 - Paper and board — Determination of air permeance (medium range) — Part 4: Sheffield method
- TAPPI T547 - Air permeance of paper and paperboard (Sheffield method)