Overview
Leneta Form HB Permeable Cardboard is a professional test cardboard for testing the resistance to penetration of building finishing materials. It sets sealed/unsealed conditions with different Porosity in adjacent areas to strictly simulate practical application scenarios and help evaluate the ability of coatings, sealed and other materials to maintain Glossiness and Color uniformity on different substrates. The product not only supports qualitative visual observation, but also obtains objective numerical results through photometric measurement.
Features
1. Designed to test penetration resistance, simulating the harsh conditions of different Porosity substrates.
2. Provide adjacent sealed and unsealed areas to form a comparative test area.
3. Support qualitative visual assessment and Basis Weight measurement.
4. Use pure white cardboard to ensure the conformity of the test background.
5. Encasement of standard specifications for easy laboratory use and storage.
Principle
The cardboard provides a test sample (e.g. paint, sealed) with a substrate surface that mimics the inconsistent absorbency that may be encountered in real building finishes by placing adjacent but different areas of Porosity on its surface (one area is sealed and the other is unsealed). After the test material is Spreader on the cardboard, its penetration and performance differences in different Porosity areas can be visualized or measured by a photometer to evaluate the material's anti-penetration performance, i.e. its ability to maintain uniform Appearance on different substrates.
Applications
Penetration resistance test of architectural coatings, sealed performance evaluation, quality control of coating laboratory, new product performance verification of R & D department
Steps
1. Prepare the paint or sealed sample to be tested.
2. Place the Leneta Form HB cardboard flat on the test table.
3. Using the specified coating applicator, Spreader the test sample evenly in the test area of the cardboard, covering both sealed and unsealed parts.
4. Under standard drying conditions.
5. After drying, perform qualitative visual comparison on adjacent areas to observe the uniformity of Color and Gloss.
6. Use a photometer to measure the Glossiness or Color values of the two areas separately, record and compare the data.
Notice
• Before testing, make sure that the surface of the cardboard is clean, flat, and free of damage.
• Spreader samples, ensure that one operation covers the comparison area to ensure consistent test conditions.
• Humidity conditions in accordance with the relevant test standards shall be strictly followed during the drying process.
• When making photometric measurements, make sure the instrument is calibrated correctly and the measurements are made at the same location in each area.
• Cardboard should be stored in a cool drying place to avoid moisture or bending.
