Gloss Meter | How to Measure the Card gloss?
1. What are the requirements for the gloss of glossy cards?
Due to the different use of glossy cards, their gloss requirements are also different. Generally speaking, paper gloss cards that are commonly used and text-based prints, are widely used in order to prevent eye fatigue and reduce costs. For commercial prints, mainly art pictures, trademark decoration, etc., in order to make the color of printed products bright and pleasing to the eye, paper with high gloss is often required.
In addition, the gloss of the appearance of the cards are different if they are made of different materials and processing technologies. For example, the gloss of metallic glossy cards is often higher than that of paper cards. If you want to accurately evaluate the gloss of a gloss card, you can use a special gloss meter to measure it.
2. Gloss meter checks the quality of gloss cards
Gloss meter is an instrument used to measure the gloss on the surface of paint, paper, plastic, furniture, ceramics, enamel, marble, rubber, ink, leather, diamond and various fabric products. Gloss is a characteristic of the object appearance. It describes the spatial geometric distribution of the light reflected on the material surface. There are various methods for measuring the gloss of the sample surface. At present, most of the international methods use the specular reflection method. This method is to illuminate the standard plate and the measured sample with a beam of a certain lighting condition at a specified incident angle. At the specular reflection angle, measure the reflected light of the sample and the standard plate according to the specified acceptance conditions.
The light directly illuminates the sample at a specified angle, and collects and measures the light reflected by the sample. All specular reflection gloss values are based on the main reference standard in the future, that is, the specular gloss value of highly polished black glass is 100GU. Three basic incidences of 60 °, 20 ° and 85 ° were used to measure the reflective gloss of the glossy card mirror surface. As the angle of incidence increases, the gloss value of any surface also increases.
The 60-degree angle generally used on the market is like LS192, a universal 60-degree gloss meter from Linshang Technology. Glossy materials can be tested because the gloss is a relative value. When there is no uniform standard in the applied industry, it can be tested with the LS192 gloss meter. If the industry has a uniform standard, it is best to use the same angle of testing. Therefore, when selecting the measurement angle, you should choose differently according to different situations.
Linshang LS192 gloss meter has real-time temperature compensation function, no matter what temperature environment it is, it can ensure the stability of the gloss meter, making the measurement results stable and reliable. The temperature compensation function is realized through the instrument's real-time detection of the current ambient temperature. According to the detected ambient temperature, the drive current of the light source is adjusted in real time to ensure that under different ambient temperature conditions, although the luminous efficiency of the light source is changing, The intensity is the same, which ensures the measurement process. If the ambient temperature changes, the measurement data is still accurate.