The dentity of the starin was then convenfimed by conventional methods.The identity of the stain
then confimed by conventional methods. Preparation of red yeast rice using isolated stain was carried out on verious kinds of rice, and especially the most well known varietis of Thai glutinous rice such as Korkor 6 white glutinous rice (RD6), Kam black glutinous rice (Kam) and Sanpatong l white glutinous rice (SPT1). The red rice products obtained were studied for the and intensity of red pingment by measuring the absorbance of red extracts as 500 nm. The results indicate the most intense red pigment when using RD6 with 3 week cultvation. In order to khow the efect of nutrient variation, soybean milk was added during cultivation as amino acids source. The highest intensity was also expressed when RD6 was used with 2 week cultivation. The supplement of l ml of 0.25 g/ml soybean milk gave the porduct with more intense red color.