Overview
Leneta Form 10B Expansion Rate Cardboard is a 194 x 289mm Checkerboard test cardboard with a sealed surface and good water resistance. It is produced and designed in strict accordance with ASTM and D4941 standards, and is suitable for hiding power test experiments in paints, paints and other industries. It is a common high-end imported consumable in laboratories.
Features
1. The United States imports high-end products with reliable quality.
2. It is designed and produced in strict accordance with ASTM and D4941 standards.
3. The surface is sealed and has good waterproof performance.
4. Checkerboard with a size of 194 x 289mm for easy observation of test results.
Encasement is 250 sheets per box to meet the needs of batch testing.
Principle
This cardboard is used to evaluate the hiding power of materials such as paints. Hiding power refers to the ability of the coating to cover the Color of the underlying surface. Spreader the paint evenly on the Checkerboard cardboard during testing. After drying, calculate the cover rate (%) by comparing the difference between the black area and the white area after film, or using instrument measurement. 100% cover rate means complete cover.
Applications
Paints, inks
Steps
Spreader paints and other paints evenly onto the Form 10B test cardboard according to the film steps.
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
• Hiding power testing can also be applied to cover rate detection of transparent films and plastic products.
• When performing levelling or sag testing, refer to the corresponding ASTM standard methods (e.g. D4062, D4400) and match with special accessories (e.g. levelling device, anti-sag device, specific scratch paper, etc.).
Stir the coating evenly before testing and adjust it to the standard temperature (e.g. 23 ° C).
• Spreader process needs to be fast and uniform, and the speed should meet the requirements of the corresponding test method.
The rating process is subjective and requires comparison and judgment based on the standard board.
