Natural vegetable dye

The invention discloses a natural vegetable dye. The natural vegetable dye is prepared from, by weight, 40-60 parts of starch, 30-50 parts of rosewood, 8-18 parts of lithospermum erythrorhizon, 15-35 parts of perilla frutescens, 10-20 parts of sodium sulfite, 5-10 parts of butyl acetate, 12-18 parts of potassium dichromate, 14-20 parts of pyrazoline derivatives, 1-5 parts of polydimethylsiloxane and 4-10 parts of phenylenebisboronic acid. The preparation method is simple, and the prepared dye is high in practicability, more environmentally friendly, capable of greatly improving the tinting strength and suitable for popularization. 本发明公开了种天然植物染料，包括以下重量份的原料：淀粉40-60份、紫檀木30-50份、紫草8-18份、紫苏15-35份、亚硫酸钠10-20份、醋酸丁酯5-10份、重络酸钾12-18份、吡唑啉衍生物14-20份、聚二甲基硅氧烷1-5份、对苯二硼酸4-10份。本发明制备方法简单，制备的染料实用性强，更加环保，其着色力大大提高，适合推广。