Liquid Coating Color Detection

It is usually an inspection item for non-pigmented coating products, such as varnishes, varnishes or paints.

Liquid coatings such as varnishes and varnishes produce different colors due to the absorption of light, and the depth of the color will directly affect its film-forming performance and application range. Generally, the lighter the color, the better. The conventional detection method is to compare these paint products with a series of standard color scale solutions or glass under the natural scattered light or the transmitted light of the specified artificial light source to determine the depth of the color.

Commonly used are iron diamond colorimetry, platinum diamond colorimetry, Gardner color grade method (Gard-ner. olourseale).

Since the above methods all need to be visually evaluated, there are certain errors and limitations, so in recent years it tends to popularize the use of instruments for determination. One of them is the Lovibond colorimetric method (1-vibond), which uses the Lovibond Colorimeter, and there is also a comparative Colorimeter in CHINA. Although this method has long been adopted in other industries, and is still mainly based on visual inspection, because the instrument is simple in structure, easy to use, and expressed in digital color language, its Lovibond chromaticity value is internationally recognized and commonly used. The instrument uses a combination of 72 red, yellow and blue primary color filters to quantitatively represent the color of the sample with thousands of combined Lovibond chromaticity values, thus greatly improving the accuracy and level of color representation. For the paint industry, the use of three primary color filters and a neutral gray filter can be combined and matched to match the color of the sample, thus solving the problem of the color of the sample and the color of the color scale in the iron drill colorimetry. Hue is different and difficult to judge" problem.