Name: RAJIV
Message: dear sir i am facing problrm with the solubility of reactive orange 16 can you please guide me how can i increase the solubility of the dye.

I am afraid that I do not know anything about industrial dyeing, so I may not be able to help you; my expertise is solely in the area of hand dyeing. I can, however, point out my observation that the solubility of vinyl sulfone (Remazol) dyes, of which reactive orange 16 is one, goes down markedly when you add salt. Even already-dissolved vinyl sulfone dye will precipitate out to form undissolved dye if you add too much salt to it. If the manufacturing process for your particular batch of reactive orange 16 has left too much salt in it, you will always have problems with solubility.

For hand-dyers, it is often useful to point out proper technique for dissolving dye. First add a small amount of water to your dye powder and stir it to form a smooth paste. This is called "pasting up". Only after the dye paste is smooth should you add additional water. A stainless steel whisk or an electric blender can be very helpful in mixing after adding additional water.

Vinyl sulfone dyes are long-lasting in water solution. They will last at least three months, and probably over a year, after being mixed with water at a neutral pH and being stored at 21°C or below.

See "Vinyl Sulfone Fiber Reactive Dyes".

(Please help support this web site. Thank you.)