龙船花压花保色方法研究

Research on the Color Preservation Method of Ixora Flower Embossing

以红色龙船花为试材,采用不同的化学保色和物理干燥方法研究其保色工艺。化学保色法采用不同浓度蔗糖、葡萄糖、柠檬酸溶液、1:1的柠檬酸+蔗糖溶液(保色剂A)、1:1柠檬酸+葡萄糖溶液(保色剂B)、1:1硫酸镁+柠檬酸溶液(保色剂C)、食用色素(胭脂红),分别浸泡龙船花1 h;物理干燥法采用自然干燥法、压花板干燥法、微波干燥法和恒温箱低温(40℃)加热干燥法,研究不同种类保色剂和干燥法对龙船花的保色效果。结果表明,单独用糖酸和食用色素处理时,15%蔗糖、5%葡萄糖、5%柠檬酸和20%的食用色素浸泡龙船花保色效果较好;糖酸等组合处理时,10%的柠檬酸+蔗糖组合、5%的柠檬酸+葡萄糖组合和5%的柠檬酸+硫酸镁保色效果较好;花材压制干燥处理方法以普通干燥板压制较好,表现为压花花材色彩鲜艳、质地柔软、平整、干燥时间较短,综合保色效果好。

Using red Ixora flower as the test material,different chemical and physical drying methods were used to study its color retention process.The chemical color retention method uses 1%,5%,10%,15%and 20%concentrations of sucrose,glucose,citric acid solution,1:1 citric acid+sucrose solution(color retention agent A),1:1 citric acid+glucose solution(color retention agent B),1:1 magnesium sulfate+citric acid solution(color retention agent C),and edible pigment(carmine)to soak Ixora flowers for 1 hour respectively;the physical drying method adopts natural drying method,embossing board drying method,and microwave drying method to study the color retention effect of different types of color retention agents and drying methods on Ixora flowers.The results showed that when treated with sugar acid and edible pigments alone,soaking Ixora flowers in 15%sucrose,5%glucose,5%citric acid,and 20%edible pigments had the best color retention effect;When treated with combinations of sugar and acid,the combination of 10%citric acid and sucrose,5%citric acid and glucose,and 5%citric acid and magnesium sulfate have the best color retention effect;the common drying board is the best method for pressing and drying flower materials,which is characterized by bright colors,soft texture,smoothness,short drying time,and good overall color retention effect.