In general, the hotter a grain is kilned, the less its diastatic activity; as a consequence, only lightly colored grains can be used as base malts, with Munich malt being the darkest base malt generally available.
22.
In 1894, Takamine applied for, and was granted, a patent titled " Process of Making Diastatic Enzyme " ( U . S . Patent 525, 823 ) the first patent on a microbial enzyme in the United States.
23.
A "'digestive biscuit "', sometimes described as a "'sweet-meal biscuit "', is a semi-diastatic malt extract to " digest " some of the starch that existed in flour prior to baking.
24.
Evaluation of a malt or extract is usually done by the manufacturer rather than by the end user; as a rule of thumb, the total grain bill of a mash should have a diastatic power of at least 40 �L in order to guarantee efficient conversion of all the starches in the mash to sugars.
