[Film Properties and Measurements] - Determination of film distinctness of image

Distinctness of image refers to the clarity of the image (or projection) reflected on the surface of the film, expressed as the DOI value (distinctness of image). It can characterize the comprehensive effect of some performances related to film decoration (such as Gloss, smoothness, fullness, etc.). It can be used to grade the decorative properties of films such as aircraft, automobiles, precision instruments, household appliances, and especially luxury car bodies.

The key device of the Freshness Tester is a series of standard distinctness of image digital boards, which are represented by numbers and are divided into 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.5, 2.0 A total of 13 levels are called DOI values. As the DOI value increases, the printed numbers become smaller and smaller, and the more difficult it is to identify with the naked eye. Observe the measured surface and read the numbers next to the DOI value that can be clearly seen, which is the corresponding distinctness of image.