The test paper allows the quick and easy determination of the water distribution in butter. On contact with water the paper develops dark spots. Size and number of these spots are correlated to the distribution of water in butter. This is evaluated with a 5-point evaluation chart described in DIN 10 311. The test paper allows the quick and easy determination of the water distribution in butter. On contact with water the paper develops dark spots. Size and number of these spots are correlated to the distribution of water in butter. This is evaluated with a 5-point evaluation chart described in DIN 10 311.