...what is Casein? 

         A way of painting often applied in Europe up to World War II, particularly in
         the South West and the Balkans was already mentioned in old Hebrew texts
         reminding the housewife to keep the curd cheese for the painter visiting in
         autumn and asking the landlord to get the colored soil from the mountain in
         good time to be prepared for the painter to give everything a fresh coating on
         Thanksgiving Day.  

         Today lactic acidic casein is preferred to curd cheese as an exceptionally
         good binder for a wall paint. It is produced by manufacturing skimmed milk to
         curd cheese that is washed, pressed, ground and dried.  

         Top qualities of this fine, clean, natural product come from New Zealand.