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To produce refined (white) wheat flour, [4] grain is usually tempered, i.e. moisture added to the grain, before milling, to optimize milling efficiency.This softens the starchy "endosperm" portion of the wheat kernel, which will be separated out in the milling process to produce what is known to consumers as white flour.
In some markets, the different available flour varieties are labeled according to the ash mass that remains after a sample is incinerated in a laboratory oven (typically at 550 °C (1,022 °F) or 900 °C (1,650 °F), see international standards ISO 2171 and ICC 104/1 [35]). This is an easily verified indicator for the fraction of the whole ...
1 therm is defined in the United States as 100,000 Btu using the Btu 59 °F definition. In the EU it was listed in 1979 with the BTU IT definition and planned to be discarded as a legal unit of trade by 1994. [21] United Kingdom regulations were amended to replace therms with joules with effect from 1 January 2000. [22]