1.Sulphur Bordeaux 3B has better level dyeing and absorption rate.Sulphur Bordeaux 3B is mainly dyed with various reddish brown colors, and is dyed with Sulphur Yellow brown 5G and Sulphur Black BR in various grays, camels, light browns, etc.

2.When dyeing light colors, pay attention to strictly controlling the process conditions and the amount of antioxidant (sodium sulfide) to avoid yellowing or darkening the color.

3.If Sulphur Bordeaux 3B is used with sulphur blue to dye various shades of light gray or grass green, the dyeing should be based on sulphur blue and the temperature should be 60-70 degrees for better results.

4.Yarns used for yarn-dyed fabrics are usually made of Sulphur Bordeaux 3B, which is dyed red-brown color. The post-processing should be strengthened by washing to remove alkalinity, and then treated with 1-3 g/L glacial acetic acid at room temperature for 5 minutes to make the color light Turns red to prevent blemishes and the resulting color is brighter.

5.After dyeing with Sulphur Bordeaux 3B, the oxidation rate is slow. After dyeing, the reducing agent (sodium sulfide) should be removed from the dyed material to facilitate oxidation and color development. Use sodium perborate to strengthen oxidation, and you can get normal color light, but the fastness is slightly worse, so it is best to use matching oxidants.

6.The Sulphur Bordeaux 3B should be dissolved evenly and the dissolving time should be short, within 10-15 minutes, then the red light will be present. Otherwise, if the time is too long, the red light will disappear and the color will become dark.