Overview
LENETA Form 8A Opacity Chart is a test cardboard designed to detect paint, inks hiding power performance and levelling sagging. The surface is black and white striped and covered with a layer of seal to effectively prevent paint penetration and ensure the accuracy of test results. This product is mainly used to measure hiding power to evaluate actual production conditions such as paint application costs.
Features
1. The surface is covered with a sealed coating to prevent the penetration of the paint and ensure the accuracy of the test.
2. Adopt a black and white striped design for clear observation and evaluation of the covering effect.
3. Uniform specifications, 250 sheets per box, Encasement specification, convenient for laboratory batch use and management.
Principle
The Opacity Chart uses the black and white stripes on its surface as the test substrate. Spreader the paint evenly on the paper, and evaluate its hiding power by observing or measuring the degree of covering of the black and white stripes by the paint. The hiding ratio is calculated as: Y black/Y white * 100%, and the ratio is 100% when completely covered, that is, there is no difference between the black and white areas after filming.
Applications
Paints, inks
Steps
Spreader paints and other paints evenly on the Form 8A Opacity Chart.
2. Wait for the film to be fully dried by air.
3. Using the instrument for objective evaluation, the hiding power value can be measured and automatically displayed within 1 second.
Notice
• The lame plating method should be correct to ensure that the film thickness is appropriate, flat and uniform.
• Illumination conditions and spray booth space should be appropriate, with special attention to the lame plating mass in inaccessible areas.
• Paints need to be mixed effectively before testing.
• It is forbidden to over-polish the paint film, and special attention should be paid to the corner area during testing.
• If the test finds poor hiding power, sanding the defective area and re-painting it.
