ISO 8156 | IDF 129: 2005 - Dried milk and dried milk products - Determination of insolubility indexThis standard specifies a method of determining the insolubility index, as a means of assessing the solubility, of dried whole milk, dried partly skimmed milk and dried skimmed milk, whether non instant or instant. The method is also applicable to dried whey, dried buttermilk and dried milk based baby food, as well as to any of the dried products listed in which milk fat has been replaced by another fat, or which has been roller dried instead of spray