Dry form of premium Slovakian wine tannin from the heart of the European/Spanish Chestnut tree. Use 1/4 teaspoon per gallon for white or rosé wine must: 1/3 teaspoon per gallon for red wine must; 1/2 teaspoon per gallon for fruit wine must. Add as needed to increase astringency or zest and aid in clearing. (gives wine pucker)