6. FADING IN DENIM FINISHING
6. OZONE FADING IN DENIM FINISHING:-
With finishes a hot concept, garment manufacturers and finishing units are innovating and experimenting with new techniques to get catchy finishes. Ozone fading in denims provides an interesting look to the garment. However, the procedure and methods to be adopted need to be carefully understood.
One of the key noxious by-products of urban photochemistry is ozone and this can reach dangerously high levels of 0.5 ppm. In the presence of UV light, there is an interaction between the hydrocarbons, oxides of nitrogen and oxygen that causes release of ozone (in addition to other compounds). The release is during the day time due to presence of sunlight.
Indigo dyestuff tends to fade or turn yellow due to ozone reaction. Ozone is present in atmosphere in most industrially active and urban dwellings and is formed in the presence of sunlight or UV light. The levels of ozone can reach dangerous levels of O.5 ppm and the deteriorating effect it has on denim apparel (particularly that stored in retail shelves) is practically irreversible.
The fading rate of indigo dyestuff is dependent on
1. The position of the dye in the fibre
2. Solubility and diffusion of ozone within the fibre and
3. Absorption of ozone on the surface of the fibre.
With finishes a hot concept, garment manufacturers and finishing units are innovating and experimenting with new techniques to get catchy finishes. Ozone fading in denims provides an interesting look to the garment. However, the procedure and methods to be adopted need to be carefully understood.
One of the key noxious by-products of urban photochemistry is ozone and this can reach dangerously high levels of 0.5 ppm. In the presence of UV light, there is an interaction between the hydrocarbons, oxides of nitrogen and oxygen that causes release of ozone (in addition to other compounds). The release is during the day time due to presence of sunlight.
Indigo dyestuff tends to fade or turn yellow due to ozone reaction. Ozone is present in atmosphere in most industrially active and urban dwellings and is formed in the presence of sunlight or UV light. The levels of ozone can reach dangerous levels of O.5 ppm and the deteriorating effect it has on denim apparel (particularly that stored in retail shelves) is practically irreversible.
The fading rate of indigo dyestuff is dependent on
1. The position of the dye in the fibre
2. Solubility and diffusion of ozone within the fibre and
3. Absorption of ozone on the surface of the fibre.
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