Application of Pigments
Application of pigments -
(ii) Continuous dyeing with Pigment colours
Explanations -
Continuous Dyeing with Pigment Colours
Pale tints of polyester/cotton blend fabrics, like shirting, are dyed using pigment colours.
The subsequent steps conjure the procedure as a full.
(i) Padding
(ii) Drying
(iii) Curing
For successful dyeing, the material must undergo the correct pretreatment. Particularly crucial are the fabric's wetting characteristics.
A typical recipe for pad liquor is
Chemical | Quantity |
(1) Pigment | X gpl |
(2) Binder | 80 to 100 gpl |
(3) Sodium alginate | 10 to 20 gpl |
(4) Acid-liberating agents | 4 gpl |
(5) Exhaustion | 60 to 70% |
By including an appropriate cross-linking agent, a softener, and magnesium chloride as an acid-liberating catalyst in the pad liquid, it should be conceivable to carry out dyeing and resin finishing simultaneously.
.jpeg "Pigments colours") |
| Pigments colours |
Process of dyeing
(ii) Weigh the pigment emulsion, and add a little amount of water to create a paste, so dilution with water 10 times its weight.
(iii) Mix the acidified binder emulsion with the pigment emulsion as you add it.
(iv) Supplement it with the required amount of sal ammoniac.
(v) With stirring, add water to urge the mandatory volume.
(vi) Use a fine cloth to filter the dispersion before padding.
(vii) employing a padding mangle, saturate the material with this liquor.
(viii) Hot-flue/float dry the material, then cure it for four minutes at 150°C in an exceeding polymerize.
Test for pigment dyeing
The microscopic test is the most trustworthy thanks to checking for pigment dyeing.A 100–250x magnification is employed to look at a fibre cross-section. supported how the hue is distributed throughout the fibre section, an evaluation is produced.
(i) a traditional dye was accustomed to colouring the fibre if the colouration was equally dispersed over the complete cross-section and also the fibre wasn't "pigment dyed."
(ii) The fibre in question is pigment-dyed if pigment particles are solely deposited on the fibre surface (i.e., the highest layer within the fibre cross-section).
Questions -
- What is the application of pigment colours?
- Explain the continuous dyeing process for pigments.
- What is a test for pigment dyeing?
References
Hussain, T. (2014). Pigment Dyeing and Finishing of Cotton /Polyester Fabrics with a Modified Dihydroxyethyleneurea and various softener treatment. Life Science Journal. https://www.academia.edu/29522602/Pigment_Dyeing_and_Finishing_of_Cotton_Polyester_Fabrics_with_a_Modified_Dihydroxyethyleneurea_and_various_Softener_Treatment
Pigment dyed vs garment dyed: What’s the difference? (n.d.). Nyfifth.com. Retrieved 26 December 2022, from https://www.nyfifth.com/blog/2020/05/26/pigment-dyed-vs-garment-dyed-whats-the-difference/
Pigment Dyeing,Pigment Dyeing process,Pigment Dyeing Method,Pigment Dyed Garments,Pigment Dyed Clothing,pigment dyed fabric. (2011, February 10). Fibre2fashion.com; Fibre2Fashion. https://www.fibre2fashion.com/industry-article/5426/production-process-for-pigment-dyed-garment
ProductIP. (2021, March 8). Dyes and pigments. Productip.com. https://www.productip.com/kb/productipedia/compliance-resources/dyes-and-pigments
(N.d.). Researchgate.net. from https://www.researchgate.net/publication/260797037_Pigment_Dyeing_and_Finishing_of_Cotton_Polyester_Fabrics_with_a_Modified_Dihydroxyethyleneurea_and_various_Softener_Treatment
Part 2 Pigments - Properties and classification
Part 3 Pigment dyeing requirements
Part 4 Application of pigments by the dyeing process
Part 5 Advances Pigment dyeing
