To investigate some factors on storage of wheat flour, especially, to know the factors concerning the deteriolation of flour of the lower layer of flour bags piled in storehouses, following experiments were done:
1) When various weights were placed on the surface of wheat flour, how the chemical properties differ between them of different conditions during storage?
2) How much does water vapour penetrate through wheat flour container, made of paper, staple fiber or polyethylene? Following results were obtained:
3) The temperature of the wheat flour under a higher pressure during storage was lower than that of under a lower pressure, in summer. This fact was also ascertained in storehouses of bakeries. Such difference of temperatur, and pressure did not influence the change of chemical properties of wheat flours for about 3 months.
4) The order of permeability of wheat flour containers for water vapour was staple fiber bag>paper bag>polyethylene bag. The relative value could be numerically showed as belows (papers as 100) staple fiber 119, papers 100, polyethylen 34.
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