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The power of turquoise - Trend 2010/11
└RI 09/2010

The power of turquoise - Trend 2010/11
Textile auxiliaries for safe turquoise dyeings of PES or CO


Nice to look at - tricky to process


Due to the special structure of turquoise dyes, it is important, apart from the usual “advice and precautions“, to observe a few peculiarities when pretreating and dyeing fabric turquoise.


Experiences from practice:


Turquoise dyes tend to form agglomerates with non-ionic substances. Therefore, do not use non-ionic auxiliaries, such as wetting agents, washing agents, bleaching stabilisers, dispersing agents, running crease inhibitors or levellers, neither in pretreatment nor during dyeing.
For avoiding partial dyestuff destruction by residual peroxide and unlevelness resulting from it, we urgently recommend to remove residual peroxide ecologically and economically by a catalase of the type RUCOLASE KAT, after bleaching.


Strictly observe the instructions for dissolving of the respective dyestuff manufacturer when preparing and dissolving the dyestuff. Always add the dissolved dyestuff through a filter cloth to the liquor. Even when using dyestuffs with the same CI-number, our service laboratory found significant differences in the dissolving behaviour and microdispersion.


When dying PES turquoise, we urgently recommend the use of a reducing agent of the type RUCORIT GOX, since even with usual dyeing times there is the risk of colour fluctuations and unlevelness due to the deterioration of dyestuff on boiling.


Due to these specific problems when dyeing with turquoise dyes, Rudolf GmbH has developed processes that take account of these peculiarities in the process and when selecting auxiliaries.

 
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