Level dyeing

Levansu erase Levarternol [51-41-2] Level A suits Level detection systems Level dyeing Leveling power Lever 2000 Lever rule... 

These acid rhodamines are usually used for sHk and wool because they have level dyeing properties and show good fastness to alkaU however, they have poor lightfastness. An improved process for manufacturing 3,6-diaminosubstituted xanthenes is reaction of the inner salts of... 

Acid Leveling Dyes. These are molecular dispersions at low temperatures (tme solutions) and are simple molecules. They have low affinity at neutral pH and exhibit ionic attraction at acidic pH when the wool becomes charged. They exhibit good leveling and migration behavior. Their low affinity however also results in low fastness. 

Practical Processes. With acid leveling dyes no real problems exist because the dyes show good migration, electrolyte is added from the beginning, and rather like Class A direct dyes level dyeing is achieved by prolonging the times at the boil. 

Level Dyeing Techniques. It is exceptionally difficult to obtain level dyeings on acryhc, and temperature and pH control depend on fiber type and are not always adequate. Sodium sulfate in limited amounts can be used to some effect. The sulfate ions compete for the dye with the fiber SO3 sites and so retard the rate of dyeing by forming a dye complex with the ions. The effect of sodium sulfate is best with dyes having the lowest... 

Wool—Acrylic Fibers. This blend is being used for iadustrial and hand knitting yams. The acryHc fiber is aesthetically similar to wool, iacreases the strength of the yam, and adds bulk to the goods. Special precautions are necessary siace the two fibers are colored with dyes of opposite ionic type. Coprecipitation is prevented with the use of an antiprecipitant. Usually, level dyeing acid dyes are used for the wool portion in combination with the cationic dyes for acryHc fiber. 

Egalisier-farbstoff, m. leveling dye. -lack, m. Leather) top coat. 

Level dyeing problems can be divided into two broad categories [336] ... 

There are also two fundamental mechanisms that can contribute to a level dyeing ... 

Many, but not all, levelling agents promote migration of dye in addition to retarding dyeing, such agents will obviously be a further aid to level dyeing. In some cases, however,... 

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