DENIM TUTORIAL l PP SPRAY

                                        https://www.youtube.com/watch?v=q17XFhOp_Qw

Denim PP Spray

After hand process like scraping, potassium permanganate spray to achieve bright look, Its a regular
process done on  Denim, Twill, poplin, corduroy fabrics. It is done after the first wash. Liquid potassium permanganate color is pink but after applied to garment turns to muddy brown or grey on drying. Sometimes acetic acid or phosphoric acid is mixed to increase its intensity.  It is always followed by the neutralization by Na-meta bysulphate or other neutralizing agents. The concentration of potassium permanganate will control the extent of brightness or effect.

Process Of Making Solution

1. water taken 1 liter , say
2. Potassium permanganate ( .4- 15 gm/L ) ( standard stock solution = .4 % )
3. Acetic acid ( as per need )
Indigo dyed fabrics treated with low concentration whereas sulfur black dyed fabrics need high concentration to treat.

Machines / Apparatus and requirements required :

1. P. Spray Cabin
2. Spray gun
3. Air Dummy
4. Water circulation system
5. Musks, Gloves , safety shoes and apron
6. Electricity

Process and Steps Given Below:

1. Garments are taken to P.P.Cabin and mounted on Air dummy filled with compressed air so the     garment is full fit to be exposed.
2. Different size dummy is used for different garment sizes and styles like men’s trouser and shirts
3. The cabin must have air exhaust system facility.
4. The treatment room where the spray is done , the chemical mixed air is passed through water     shower
5. Water dissolves the p. p. and clean air is blown out to open.
6. The p. p. is sprayed on the garments.