Using Commercially available chemicals for the fixation of sulfur dyes in Sulfur Printing (Coating).

SUBJ-16:
Using Commercially available chemicals for the fixation of sulfur dyes in Sulfur Printing (Coating).

Chemicals:

Sodium Bicarbonate, Sodium perborate, Zinc Oxide, Resist Salt, Borax, Sodium Alginate, Soap (Polyglycolether, Nonionic).

Purpose:

Chemical Industries are offering different products for better fixation (oxidation) of sulfur dyed/Printed or coated fabric to ensure good wash fastness and to meet the requirement of buyer. Many Standards included in ISO used chemicals which are true test of color. So, meeting the need is a goal here.

Oxidation is the last step involve in printing of Sulfur Dyes. Oxidation phenomena actually brought back the dye to its original structure Big complex Molecular structure which is actually responsible for the good washing fastness of sulfur Dyes. Different Oxidation method which can be applied are

Oxidation through Air (atmospheric oxygen)

Oxidation through Chemicals

Acetic Acid

Hydrogen Peroxide

Commercially available Oxidizing agent like One of the famous in market Clariant product Diresul Oxidant BRI.

Sodium Bicarbonate

Sodium boromate
Sodium perborate
Resist Salt

So, In this post we are trying to test some oxidizing agents Or Chemicals for their performance in bath. Chemicals tested are…

1. Sodium bicarbonate
2. Borax
3. Sodium perborate (Better Oxidizing Agent)
4. Zinc oxide
5. Resist Salt (Mild Oxidizing Agent)
6. 
   

Fixation with

                 Sodium Bicarb       Borax              Sodium Per borate       Zinc Oxide            Resist Salt

Note:

Fixation through different modes has been analysed here and best commercial available chemical can be used for oxidatin is sodium perboate.

Recipe for Oxidation:

We can call this as our last stage mean washing stage and here we will carry out oxidation too.

1. Cold rinse
2. Hot Rinse
3. Hot Rinse With 5g/L Acetic Acid 80% Conc, Ph around (4.5)

(rinse it in acetic bath for One Min)

4. Hot Rinse With 5g/L Acetic Acid 80% Conc, Ph around (4.5)

Oxidizing agent (Any of above five Mentioned approx 5g/L)

(rinse it in acetic bath for One Min)

5. Soap at 100^oC With Soap (For example a market famous soap Ladipur RSK Clariant Product)
6. Hot Rinse
7. Cold Rinse

Remarks:

If you are viewing this page on other forum, social networking site like Facebook, you are welcomed to visit http://appchemistry.blogspot.com and subscribe for daily updates

Related Posts

Sulfur Printing (Coating).

http://appchemistry.blogspot.com/