What You Need to Know
The Standard Reference Method or SRM is one of several systems modern brewers use to specify beer color. Determination of the SRM value involves measuring the attenuation of light of a particular wavelength (430 nm) in passing through 1 cm of the beer, expressing the attenuation as an absorption and scaling the absorption by a constant.
Steps
- 1.
Czech Pilsner (Czech Republic): Standardized golden color measurement (2-6 SRM)
- 2.
British Porter (England): Dark beer color control (20-30 SRM)
- 3.
Belgian Dubbel (Belgium): Amber color specification (10-17 SRM)