Super Stonewash of Denim Garments without Pumice Stones
Super stonewashing is a washing procedure for indigo-dyed jeans wear. Especially along seams and edges these so-called super-stonewashed garments become distinctly brighter. By adding special stonewash enzymes, strong washing effects can be achieved even without using pumice stones in only one wash cycle. Stonewashing without pumice stones offers clear advantages, as the stones do not need to be removed from the garments afterwards with considerable manual effort. Furthermore, the abrasion products of the stones could cause problems in the production, in the drum washing machines as well as in the sewage system and the wastewater treatment.
Enzymatic Super Stonewash with PERIZYM SC 400 and PERLAVIN PSP
For the super stonewash on drum washing machines we offer our new neutral enzyme preparation PERIZYM SC 400, which was developed particularly for the application without pumice stones. In combination with our special detergent PERLAVIN PSP you can achieve very high abrasion and thus very strong brightening effects with reduced redeposition of removed indigo dyestuff and fibers (low backstaining) at the same time. In addition, super-stonewashed garments have a pleasantly soft handle even without additional softeners.
PERIZYM SC 400 is suitable for the application at relatively low temperatures. The best abrasion effects can be achieved at temperatures from 35 to 50 °C. Furthermore, the cellulase preparation contains an integrated buffer system. Backstaining can be moreover reduced by the addition of PERLAVIN PSP, which has outstanding dispersing capacities. This way, backstaining through detached indigo dyestuff or colored fiber fragments on the white weft yarn can be almost completely avoided. Particles, removed by the cellulase enzymes, are dispersed in the liquor so they can be optimally removed from the fabrics in the final rinsing process.
Mode of Action of Cellulase Enzymes
"Enzymes are so-called biocatalysts. Cellulases are special enzyme proteins, which are able to split the 1,4-glycosidic bonds of cellulose molecules. In textile finishing cellulase enzymes are applied for example in biopolishing but also for the washing of denim garments. Through the application of cellulases in garment washing protruding fibers as well as indigo dyes are removed from the surface of the denim fabrics. This way, fabrics with ring-dyed warp yarns get a shabby, worn, washed look. Before cellulase enzymes were used in textile finishing, those so-called stonewash effects were obtained by purely mechanical processes like stonewashing with pumice stones."
Our Recipe Recommendation for PERIZYM SC 400 and PERLAVIN PSP
For the enzymatic stonewashing of indigo-dyed denim wear we recommend the application of PERIZYM SC 400 and PERLAVIN PSP according to the following recipe:
|0.5 - 2.0||g/l||PERIZYM SC 400|
|1.0 - 2.0||g/l||PERLAVIN PSP|
The optimal application quantity of PERIZYM SC 400 depends on:
- desired stonewash look
- weight and type of denim being processed
- degree of desizing
- liquor ratio
- duration of treatment
- machine type
The pH value for a treatment with this neutral cellulase should be adjusted between 6.5 and 7.5. PERIZYM SC 400 already contains an integrated buffer system, which automatically adjusts the required pH value. Depending on your process water, you might not need to use an additional buffer. Depending on the desired effect, the treatment takes approximately 20 to 60 minutes at 35 to 50 °C at a liquor ratio of 3:1 to 10:1. The use of pumice stones is not necessary. In order to avoid a possible enzymatic damage of the cotton fabric the treatment should be followed by an enzyme stop. This can be done by a five-minute treatment at 85 °C or by the addition of 1 g/l PERISTAL WWC. PERISTAL WWC is a special agent for the garment finishing. Finally, the garments are rinsed and dried on the tumbler.
For further information about the application of PERIZYM SC 400 please download our new flyer here.
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For obtaining fashionable effects on denim or non-denim garments, we offer a large number of specialty products. If you have questions about our textile auxiliaries for garment finishing or if you need support in creating new styles, our garment specialists look forward to assisting you.