Characteristic Test（Optical Characteristic）
The characteristic related to light, such as opacity, which stands for the light transmission prevention level of sheets, as well as light resistance, are tested.
The light transmission prevention level of sheets is measured. This is expressed by the ratio in reflectance between the case where a paper is placed on the specified white standard plate and the case where a paper is placed on the specified black plate. This is an important measurement for sheets when they do not need to be transmissive.
Light resistance (weather resistance) measurement
The resistance to light such as ultraviolet ray is measured. Delivering intense light from a xenon lamp that shows the wavelength distribution similar to solar light estimates the service life in a shorter time in reality. It is also possible to evaluate weather resistance by contacting water in addition to light. Depending on the circumstances, we outsource the evaluation to public institutions.