Tinting or Overdyeing

What is TINTING? After denim pant is being faded, the pants have dyed with very light color(.001% or . 002%yellow or pink).This dyeing process is called Tinting/Overdyeing .This process is applied only on garments, not in fabric or yarn. Necessity of Tinting • • •

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

Process of Tinting Tinting is a process where very less amount of tint is involved & mainly direct dye is being used to do this process. This is being done to change hue/cast/tone of indigo. As soon as quantity of tint color increases & it cover up indigo, reaches the level of dyeing. Tinting being used to give garments a used / vintage & muddy look. This process takes from 5 minutes to 15 minutes time for better results followed by dye fixing & clean up of superficial dye. Dyeing is being done on very light shade of Indigo, Ecru/ grey denim & Ready for dyeing denim. There are various Types of dye. The comparison of these dyes is given in the chart here below: 1. Direct Dyes 2. Reactive Dyes 3. Pigment Dyes 4. Sulphur Dyes

Tint Denim Garments Without Changing the Tone of Indigo: Tinting is achieved by application of the direct/reactive dyes. In case of direct dyes, the second application would be that of dye-fixing agent for an adequate fastness. In case of reactives, the fixing chemical goes along with the dyestuff. After the application, the treated garment is dried in the air or in a tumble drier for adequate fastness. If tinting were done by immersion method, the tint would be all over. However, if a localized area is the target, a spray method is used. In either case the tinting, as the term signifies, is done very lightly to achieve a particular cast, either overall or localized. If indigo does not change tone would look like a print with a sharp boundary. When tone changes fad gradient, the effect looks more aesthetically appealing and is considered desirable. The tone-change should be gradual and not abruptive.

Tinting With White Discharge Effect on Denim Garments: The standard route to blasting/discharging/tinting is quite elaborate, in the light of three effects to be imparted on the same garment. There have been short cuts, which may be right/wrong/ingenious. If tinting is done on blasted/discharged areas, it obviously remains a spray method. However, if the tinting is overall, it follows the dyeing route. The process starts on gray garment being hand blasted followed by desizing and biopolishing. After drying the garment, tint-spray is given followed by air/machine drying and finishing. For tinting by dyeing method, the biopolished garment can straight away go for tinting wet-on-wet followed by finishing and drying. In case of white discharge tinting the route would start with desizing-biopolishing on gray garment, peroxide bleaching after biopolishing being optional. After drying the garment, a potassium permanganate spray is given to areas where white discharge is aimed at. After airdrying for about 10-15 minutes, a neutralization step consisting of provide-acetic acid is given which is followed by hot and cold rinses. In case of spray tinting the garment will have to be dried first, whereas for overall tinting, dyeing the method could be followed wet-on-wet. Finally the finishing and drying would complete the process. Tinting and over dyeing can be highlighted by the following way: 1. This type of process is done after different types of washing before softening. 2. Normally after Acid wash, Stone wash, Stone enzyme wash, Sand Blasting, Enzyme wash etc. tinting & over dyeing is done. 3. Tinting & over dyeing is done with Direct dyes or Reactive dyes. 4. Due to tinting and over dyeing, the white/base area colored with required dye yellow,Brown, Orange etc. 5. As a result, new color effect is produced in the garments. 6. 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.

Tinting by Direct Dye: First Step: After different wet processing i.e. Acid wash, Stone wash, Enzyme wash, Stone enzyme wash, Bleach wash take 60 kg garment for Tinting & over dyeing. 1. Water at L : R = 1: 7.............. 420 Liter 2. Run the Machine.

3. 4. 5. 6. 7. 8. 9.

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 1. 2. 3. 4. 5. 6.

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. 1. 2. 3. 4. 5. 6. 7.

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 m/c for complete drying. Sixth Step: - Quality & Delivery. After drying the garments go to quality checking & rectify washing fault and then good one delivery. Tinting by Reactive dye: First Step: After different wet processing i.e. Acid wash, Stone wash, Enzyme wash, Stone enzyme wash, Bleach wash take 60 kg garment for Tinting & over dyeing. 1. 2. 3. 4. 5. 6.

Water at L : R = 1: 7.... 420 Liter Run the Machine. Temperature................. 60°c Reactive Red Reactive Yellow - Brown ......... 100 gm. Reactive Black -

7. Leveling agent - at 0.5 gm / liter.......240 gm. 8. Salt - at 20 gm / liter........... 8.40 kg. 9. Soda ash at 10 gm / liter ............ 4.20 kg. 10. Time................................ 20 to 30 mts. 11. Drop the liquor. Second Step: Fixing. 1. 2. 3. 4. 5. 6. 7.

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. 1. 2. 3. 4. 5. 6. 7.

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 m/c for complete drying. Sixth Step: - Quality & Delivery. After drying the garments go to quality checking & rectify washing fault and then good one delivery.