Step by Step Tinting and Over Dyeing Process in Textile Industry

Last Updated on 01/06/2022

What is Tinting and Over Dyeing in Textile?
After denim pant is being faded, the pants have dyed with very light color (0.001% or 0.002% yellow or pink). This dyeing process is called Tinting and Over dyeing. This process is applied only on garments, not in fabric or yarn. Tinting of denim garment is usually done after the stone wash process. A very small amount of dye is used in tinting. The process changes the hue/cast/tone of indigo. As soon as the tinting color covers up the indigo, it reaches the level of dyeing. Tinting gives garments a used/vintage and muddy look. Traditionally tinting is done with direct dye or reactive dye. For tinting direct dye is popular than reactive dye.

tinted jeans
Fig: Tinted jeans

Tinting or over dyeing can be highlighted by the following way:

  • This type of process is done after different types of washing before softening.
  • Normally after Acid wash, Stone wash, Stone enzyme wash, Sand Blasting, Enzyme wash etc. tinting and over dyeing is done.
  • Tinting and over dyeing is done with direct dyes or Reactive dyes.
  • Due to tinting and over dyeing, the white/base area colored with required dye yellow, Brown, Orange etc.
  • As a result, new color effect is produced in the garments.
  • If direct dye is used then color fixing treatment should be done at the end of dying process. In case over dyeing/Tinting with reactive dyes, color fastness is good hence no after treatment is required to fix the reactive dyes.

Importance / Necessity of Tinting and Over Dyeing:
The reasons of tinting are-

  1. For making new fashions.
  2. To give the finished garments a better appearance.
  3. For inventing a new process

Tinting and Over Dyeing Process by Direct Dyes:
Direct dyes are currently being applied in garment dyeing of jeans in light colors for the higher fashion market. Direct dyes can also be used for tinting denim fabrics by adding to finishing formulation. Tinting and over dyeing process by direct dyes are given below:

First Step: Wet Processing
After different wet processing i.e. Acid wash, Stone wash, Enzyme wash, Stone enzyme wash, Bleach wash take 60 kg garment for Tinting and over dyeing.

  • Water at L : R = 1: 7………….. 420 Liter
  • Run the Machine.
  • Temperature…………….. 50 – 80°c
  • Dir. Brown GTL – at 0.04%……….. 24 Gms.
  • Dir. Orange ZTL- at 0.01%……….. 6 Gms.
  • Add Salt at 20 gm / liter ………… 8.40 kg.
  • Add Leveling agent at 0.5% /…….. 210 gm.
  • Time………………………….. 10 to 30 mts.
  • Rinse by cold water 3 minutes.

Second Step: Fixing

  • Batch size ………………………… 60 kg.
  • Water at L : R = 1: 7………….. 420 Liter
  • Run the Machine.
  • Temperature…………….. 50°c
  • Add fixing agent at 0.8 % (owf) … 480 gm.
  • Time…………………………………….. 10 mts.

Third Step: Softening

  • Batch size……………….. 60 kg.
  • Water at L : R = 1 : 7 ………………………. 420 Liter
  • Add Acetic Acid at 0.6 gm/liter ………… 250 gm.
  • Add Cationic softener at 1 gm/liter …… 420 gm.
  • Time………………………….. 10 mts.
  • Drop the liquor.
  • Then unload the garments on trolley.

Fourth Step: Hydro extractor machine.
Hydroextractor machine
is used to remove excess water from the garments.

Fifth Step: Dryer machine
After hydro extraction the garments are sent to drying machine for complete drying.

Sixth Step: Quality and Delivery
After drying the garments go to quality checking and rectify washing fault and then good one delivery.

Tinting and Over Dyeing Process by Reactive Dyes:

First Step: Wet Processing
After different wet processing i.e. Acid wash, Stone wash, Enzyme wash, Stone enzyme wash, Bleach wash take 60 kg garment for Tinting and over dyeing.

  • Water at L : R = 1: 7…. 420 Liter
  • Run the Machine.
  • Temperature…………….. 60°C
  • Reactive Red
  • Reactive Yellow – Brown ……… 100 gm.
  • Reactive Black –
  • Leveling agent – at 0.5 gm / liter…….240 gm.
  • Salt – at 20 gm / liter……….. 8.40 kg.
  • Soda ash at 10 gm / liter ………… 4.20 kg.
  • Time………………………….. 20 to 30 mts.
  • Drop the liquor.

Second Step: Fixing

  • Batch size……………….. 60 kg.
  • Water at L: R = 1 : 8 ………….. 480 Liter
  • Run the Machine.
  • Temperature……………………………. 50°C
  • Add fixing agent at1 gm / liter….. 480 gm.
  • Time……………………………………… 10 mts.
  • Drop the liquor.

Third Step: Softening

  • Batch size……………….. 60 kg.
  • Water at L : R = 1: 7………….. 420 Liter
  • Add Acetic Acid at 0.6 gm/liter ………… 250 gm.
  • Add Cationic softener at 1 gm/liter …… 420 gm.
  • Time………………………….. 10 mts.
  • Drop the liquor.
  • Then unload the garments on trolley

Fourth Step: Hydro extractor machine
Hydro extractor machine is used to remove excess water from the garments.

Fifth Step: Dryer machine
After hydro extraction the garments are sent to drying machine for complete drying.

Sixth Step: Quality and Delivery
After drying the garments go to quality checking and rectify washing fault and then good one delivery.

Single Bath Stone Washing and Tinting Technique:
We already know that, tinting and overdyeing of denim garment is usually done after the stone wash process. In this, garment has been lightly colored in order to give the final denim appearance a slight shift. This is not true about over dyeing but merely gives the impression of a change in the overall color of the fabric. This process consumes large quantity of water and chemical. To make this process economical and ecologically friendly, some novel color-based enzymes have been introduced in the market. By using this new technique, tinting and stone-washing effect can be achieved in a single bath.

The advantages of this system are:

  1. Less process time to achieve a tinted look.
  2. No extra chemical required, therefore, making process is more economical.
  3. Less water consumption.
  4. Less energy consumption.
  5. The chances of patchiness or unevenness in the garment are almost zero.

Conclusion:
Tinting is a new trend in denim products. It is a new fashion. This fashion is now very popular in general. So measure should be taken and more research work should be done to make it better in future.

You may also like:

  1. Performance Analysis of Denim Garments by Bleach Wash
  2. Stone Washing Process of Denim Fabric
  3. Effect of Enzyme Wash on Denim Garments
  4. Enzyme Stone Wash Process of Garments
  5. Denim Enzyme Wash Process
  6. Ozone Fading Techniques for Denim Finishing
  7. Bleach Washing: Objects, Working Procedure, Advantages and Limitations
  8. Acid Wash Process on Denim Garments

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