Degrees Lovibond

Lore & Background

The degrees Lovibond scale was devised by Joseph Williams Lovibond as a method to measure the colour of substances such as beer, whiskey, or sugar solutions. The determination takes place by comparing the colour of the substance to a series of amber to brown glass slides, typically using a colorimeter. This scale provided an early objective standard for colour assessment in brewing.

The scale has largely been replaced by the Standard Reference Method (SRM) and the European Brewery Convention (EBC) methods. The SRM method uses a spectrophotometer or photometer to measure light attenuation at 430 nanometres (blue) through a sample in a standardized cuvette. The SRM gives results approximately equal to the degrees Lovibond. The EBC also measures beer and wort colour, as well as quantifying turbidity (haze) in beer.

Reader's Guide

The degrees Lovibond scale represents an early attempt to standardize colour measurement in brewing, a key characteristic that, along with bitterness, flavour intensity, alcohol content, and colour, defines beer. While the article notes that the scale was devised by Joseph Williams Lovibond and uses visual comparison to glass slides, it has been largely superseded by more precise instrumental methods. The Standard Reference Method (SRM) now provides results approximately equal to the °L, using spectrophotometry at a specific wavelength. The European Brewery Convention (EBC) method also measures colour and turbidity. The legacy of the Lovibond scale is that it established colour as a quantifiable attribute in brewing, paving the way for modern systems that allow objective and uniform determination of beer qualities. Though no longer the primary method, its approximate equivalence to SRM means its values remain relevant in historical and some practical contexts.