Studies on Colorants in Saké

(X) On the Unusual Factors which colorize Saké exposed to Sunlight

Abstract

It was investigated what kind of factors took part in the color development of saké caused by sunlight.
There were ether soluble factors in the unusual saké which were named Y factors. Y factors and ether insoluble compounds in saké formed colored substances by exporsure to sunlight.
Y factors were fractionated by silica gel chromatography into four fractions. Properties of Y factors were studied.