27 CFR 24.321: Decolorizing material record.

A proprietor who treats juice or wine to remove excess color with activated carbon or any other decolorizing material shall maintain a record to show:

(a) The date the decolorizing material is added to the juice or wine;

(b) The type (e.g. grape variety or kind of wine) and volume of juice or wine treated with decolorizing material; and

(c) The kind and quantity of decolorizing material used to treat the juice or wine.