FIELD: chemistry.
SUBSTANCE: to obtain dye applied is milled thermally processed carrot and dried and milled squeezed blackberry berries Carrot is crushed to small chips and processed in air atmosphere at 40°C, 60°C and 80°C with keeping at each temperature for 2 hours Squeezed blackberry barriers are dried at 55-60°C and milled Mixture of prepared carrot and squeezed berries in ratio 1:1-3:1 is twice extracted by 4-multiple volume of ethyl alcohol with volume part of ethanol 96% at 55-60°C for 1 hour Extracts are combined, settled for 2 hours, filtered and concentrated under vacuum to the content of dry substances not less than 68%.
EFFECT: obtaining natural dye, enriched with natural antioxidants, with high dyeing ability with extension of colour range from yellow to vinous-red and reduction of prime cost of dye due to application of wastes of blackberry berries processing.
1 dwg, 1 tbl, 3 ex
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