What is the Lovibond Scale?
The Series 52 Lovibond Scale (°L) consists of individual slides or solutions for Lovibond specific values. The SRM method was initially designed to be comparable to the Lovibond scale and the two scales are almost identical for most of their range. However, as wort...What is the Standard Reference Method (SRM)?
The Standard Reference Method (SRM) is a method for color assessment of wort recommended by the American Society of Brewing Chemists (ASBC). The SRM of a sample is measured in a cell path length of 1cm with 430nm wavelength light. The absorbance level measured is then...What is the 1932 CIE xy chromaticity diagram?
The 1932 CIE chromaticity diagram is one way to objectively describe color. The three components of human color perception (red, green, and blue) can be transformed to another three dimensional space where one axis is radiance/luminance independent of chromaticity and...What is Color Purity?
Purity, which is equivalent to saturation when talking about xy chromaticity, describes how “pure,” or monochromatic, a color is at a given lightness. For example, consider all spectra with a lightness of 50. The spectrum could be composed of equal intensities of all...What is Delta E (ΔE) used in Colorimetry?
Delta E is an equation to describe the difference between two colors when using the CIE L* a* b* graph. It is defined as follows: As a general rule of thumb, a delta E of one is barely perceptible and a delta E greater than three means two different colors. However,...
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