染色单板颜色稳定性的研究

设计正交试验对大青杨单板和桦木单板进行不同固色工艺的染色处理,考察不同的染料、固色剂、固色剂添加量以及添加方式对染色单板颜色稳定性的影响。结果表明：1）正交试验所考察的各影响因素对大青杨和桦木染色单板色牢度的影响规律是一致的。2）染料种类对染色单板色牢度影响最为显著,不同染料的耐水洗色牢度大小顺序为：直接染料〉活性染料〉酸性染料〉碱性染料;耐日晒色牢度的大小顺序为：酸性染料〉直接染料〉活性染料〉碱性染料。3）固色剂有助于提高染色单板的色牢度,纯碱是比重铬酸钾更为理想的固色剂。4）固色剂按染液质量的0.3%添加可获得较理想的固色效果,过多的添加量不会更大地提高固色效果。5）固色剂的不同添加方式对于固色效果无显著影响。

Study on Color Stability of the Dyed Veneer

The Chinese white poplar veneer and birch veneer were dyed with different color fastening methods following an orthogonal experiment so as to investigate the effects of different dyestuffs,color fastening agents,dosages and add in methods of color fastening agents on the color stability of the dyed veneer.The results show that:1) All the 4 factors investigated in the orthogonal experiment have effect on the color stability of the two types of veneer in the similar trend.2) The factor of dyestuff types has the most significant effect on the color stability of the dyed veneer,and the color fastness against water bath of the 4 dyestuffs is ranged in such order:direct dyestuff> reactive dyestuff> acid dyestuff> basic dyestuff;and the order for color fastness against light is:acid dyestuff> direct dyestuff> reactive dyestuff> basic dyestuff.3) The color fixing agents do help in improving the color stability of the dyed veneer,and sodium carbonate has a better comprehensive performance than potassium dichromate when serving as the color fixing agent.4) A good color fixing effect can be achieved when the dosage of the color fixing agent is 0.3% in proportion to the total weight of the dyeing liquor;any higher dosage will not improve the color fixing effect too much.5) Different add in methods present no significant differences in the color fixing effects.