alum salt
in stock
alum salt or potassium alum (coarse salt) is a natural fixative for lime. its role is to help fix the pigments in lime.It is mainly used in whitewashes and tends to make them more solid. it is not used to help fix lime on a support, in this case its effectiveness is less, therefore prefer another fixer with which you can associate it. Its dosage is 10% relative to the weight of the lime.
€2.70