Graham flour food shops, or directly from a flour mill that has experience making it. A substitute for it would be a mix of unbleached white flour and wheat middlings; this was a common substitute prior to and after the passage of the Pure Food and Drug Act in 1906, but the FDA gradually established standards and eliminated imitations from the market. Graham flour is named after Sylvester Graham (1794–1851), an early advocate for dietary reform. Graham despised the discarding of nutrients such as germ and bran when making flour for white bread, and believed that using all of the grain in
Flour imported from Japan and the Japanese name Zenryufun(全粒粉) is used. It is possible to determine ash content from some US manufacturers. However, US measurements are based on wheat with a 14% moisture content. Thus, a US flour with 0.48% ash would approximate a French Type 55. Other measurable properties of flour as used in baking can be determined using a variety of specialized instruments, such as the farinograph. Flour dust suspended in air is explosive—as is any mixture of a finely powdered flammable substance with air ("see" dust explosion). Some devastating explosions have occurred at flour mills, including an explosion