Dyeing of Bamboo Viscose Fiber with Gardenia Yellow and Sodium Copper Chlorophyll

The dyeing pr degrees Cess of bamboo viscose fiber with two vegetable dyes of Gardenia yellow (GY) and sodium copper chlorophyll (SCC) was studied. The optimum dyeing conditions in the absence of mordants were as follows: neutral medium; 70 degrees C for GY, and 80 degrees C for SCC. The trials of different mordanting methods showed that post-mordanting gave the highest color depth. Thus the effects of mordant dosage, temperature, pH and time for post-mordanting on the color depth of the dyed fiber were further discussed. The satisfactory effects were achieved in the case of low mordant dosage, low temperature, and neutral medium for GY dye, whereas the opposite conditions should be applied for SCC dye.