Since Vestagon B68 came into market, there is no predominated acidity range of XX68 type matting hardener yet which is accepted by all manufactures. AHA 68 is one of XX68 type matting hardeners. Acid Value test has been done in our lab, continuously for quite a long time, total 150 batches of AHA 68 had been tested. The acidity ranges are from 412mgKOH/g to 445mgKOH/g. Besides, the mode is 432mgKOH/g, this means the concentrated in the acid value of AHA 68 distributions at 432mgKOH/g. In addition, the median is 430mgKOH/g.
