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Dry Finishing Process of Denim

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Destroying is an art of making denim unique and different used look. Destroying can be achieved by cutting the warp yarns of denim through knife and keep the weft yarns as is to show white thread. Holes also can be made by cutting weft and warp yarns both. These are all manual processes & every garment will look unique & different than others. Different types of machine used for destroy the garments. Such as Grinding Machine, Emery Cloth, Hacksaw Blade, Needle, Knife etc [1] Method: Destroy effect is achieved manually by using knife. Destroy is done by cutting the warp yarns through knife and keep the weft yarn as is to show white threads.

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First of all the knife is run along the direction of weft yarn about 10 times to cut the warp yarn up to a certain area. The area around the destroyed area is worn out to blend the destroyed area with the surrounding fabric. Finally the garment is washed to get the desired effect.

Fig.1. Destroying sample Materials used: Knife, Grinding Machine Tagging Tacking or more commonly tag pinning is a fashion style in denim garment manufacturing now a days. The procedure is very simple and proceeds as; garment is folded on required area and tacked through folds. Number of folds can be two to four or five in regular in tacking. Pin holes are some times create a problem to this process. Care is to be taken to avoid this. This damage can be prevented by increasing the number of folds in one pin or by selecting the size of pin which is not loses to fold. This problem can never be eliminated but can be minimized to certain limits. Automated tacking machines are used more successfully in some units. These machines are bit expensive but are far more efficient and secure than tag guns [3]

Method

Tagging effect is created by swift tag machines with the help of plastic or nylon tag pins. Firstly, garment is folded on required area and tacked through folds by using tag pin machines. Then washing is done on the upper side of garments which results crease mark and dark shade inside of tagging. After tagging, tag pin is removed from garment.

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Fig.2. Tagging sample Materials used: Swift Tag Machines, Tag Pins. Whiskering Mustaches or whiskers are one of the most important designs of a used look garment. The idea of whiskers is taken from the worn out lines and impression patterns generated by natural wearing on hips and front thigh area. On old jeans, a number of patterns can be found due to fabric, body shape of user or sitting posture. Various methods are designed to create this impression on jeans. Engraved patterns are used here to give whiskering effect [5] Method: Firstly, engraved patterns are made for making whisker effect. Before engraving the pattern is drawn on rubber sheet and engraved them with blade. Then garment is places on sheet and scrapped on specific area to draw this effect on garment. Then washing is done on the garments to get desired effect. Fig.3.

Whiskering pattern

Materials used: Engraved Pattern, Sand Paper. Potassium Permanganate (P.P) Spray Potassium permanganate spray is done on jeans to take a bright effect on sand blasted area. One important thing about potassium permanganate spray is, this is usually a sporting process to increase the effect of sand blast. Potassium permanganate solution is sprayed on blasted area of jeans garment with the help of normal spray gun. This potassium permanganate spray appears pink on garment when fresh and turns to muddy brown on drying. The garment is hanged in open to dry after potassium permanganate spray and when the potassium permanganate turns its colors completely then it is considered to ready for next process.

A potassium permanganate spray concentration ranges from 0.25 gm per liter to 15.00 grams per liter depending to required results and fabric types. Usually indigo died fabrics are treated with low concentrations whereas black sulfur fabric requires high concentrations to treat because sulphur is not much affected with potassium permanganate and hence requires high concentrations and even sometime multiple spray operations

Method: Firstly, the garment is mounted on balloon and filled with air to get effected by PP spray. Garment is scrubbed over pattern carefully. Then potassium permanganate solution is sprayed on the blasted area of jeans garment with the help of a normal spray gun. This potassium permanganate spray appears pink on the garment when fresh and turns to muddy brown on drying. The garment is hanged in open to dry after potassium permanganate spray and when the potassium permanganate turns its colors completely then it is considered to ready for the next process. Then neutralization process is carried out with sodium meta-bi-sulphate. Fig.4. Raw sample PP sample Materials used: Potassium Permanganate, sodium meta-bisulphate, Spray Gun. References

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Dry finishing process of denim. (2018, September 27). GradesFixer. Retrieved April 21, 2021, from https://gradesfixer.com/free-essay-examples/dry-finishing-process-of-denim/
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Dry finishing process of denim. [online]. Available at: <https://gradesfixer.com/free-essay-examples/dry-finishing-process-of-denim/> [Accessed 21 Apr. 2021].
Dry finishing process of denim [Internet]. GradesFixer. 2018 Sept 27 [cited 2021 Apr 21]. Available from: https://gradesfixer.com/free-essay-examples/dry-finishing-process-of-denim/
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