Lovibond
"Degrees Lovibond" or "°L" scale is a measure of the color of a substance, usually beer, whiskey, or sugar solutions. The determination of the degrees lovibond takes place by comparing the color of the substance to a series of amber to brown glass slides, usually by a colorimeter. The scale was devised by Joseph Williams Lovibond. The Standard Reference Method (SRM) and European Brewery Convention (EBC) methods have largely replaced it, with the SRM giving results approximately equal to the °L.