Glossary
Discover our glossary! Find out everything you need to know about color measurement, color standards and spectrophotometers. Simply explained, practical and to the point. Perfect for beginners and experts!
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- AbsorptionA portion of electromagnetic radiation strikes the sample and is converted into other energy states within the sample, thereby reducing the radiation intensity. The absorption value is proportional to the sample's thickness and the amount of absorbing substances. It is calculated from the... Mehr lesen
- Angle of IncidenceThe angle between the axis of the incident light and the perpendicular to the surface of the sample is called the angle of incidence. Mehr lesen
- APHA / APHA Colour NumberAPHA stands for the American Public Health Association. The APHA color number is a finely scaled measure used to determine the color of nearly colorless to pale yellow liquids. The terms "Hazen" or "Hazen color number" and "Platinum-Cobalt color number" (PtCo) are used interchangeably, as... Mehr lesen
- ASTM - American Society for Testing and MaterialsASTM stands for the American Society for Testing and Materials. ASTM publishes technical standards for testing and analytical procedures, such as color comparisons, and currently has more than 12,000 standards. These include standards like ASTM D 1500 (glass standards with defined transmission),... Mehr lesen