Measurements on printed paper supports and coated supports
The 75º gloss meter is used in the printing and paper industry to control and measure the degree of surface gloss. With this device it is possible to measure the gloss of supports, applied ink layers and overprint varnishes.
Differences in the color and diffuse reflectance of the ink film had negligible effects on the measured gloss. Thus, measurements on otherwise identical white and black surfaces give values for the white surface that are less than gloss units above the value obtained for the black surface.
The above methods should not be applied to high gloss coated, painted, highly varnished or waxed papers or high gloss ink films. Measurements can be made at other angles, for example at 20º.
The surface of the coated support has a covering designed to limit the amount of ink absorbed by the paper in order to produce sharper, sharper prints. Uncoated supports, on the other hand, lack this coverage, resulting in lower print quality.
High-quality surfaces of samples and coatings are designed to combine transparency (or lightness) and brilliance. Although sometimes due to uneven distribution of particles, the surface may show varying degrees of gloss. This can also happen when measuring plastic surfaces that may appear opaque.
Package on metal or plastic stand
For example, printing on metal containers, or flexographic or gravure printing, or in the case of printing on flexible supports based on plastic derivatives (PP, PE, BOPP, PET, etc.). In these cases, a 75º gloss meter suitable for these surfaces is recommended.
