DYES FINGERPRINT
• Three basic color dyes can not behave exactly same, since they have structural differences.
• It means we have to choose dyes which have close behavior not exactly same behavior
DYEING FUNDA
• Slowest dyeing is the best dyeing.
• Slowest dyeing is the costliest dyeing.
• Need to find out equilibrium between them. For cost optimization, one needs to formulate optimum dyeing condition.
OPTIMUM DYEING CONDITION
• Dyes has to be it’s finest form (mono-molecular form).
• Dyes transfer rate (rate of dyeing) has to be optimized.
• Dyeing true equilibrium has to be reached.
DYES AGGREGATION
DYES IN SOLUTION
CHELATION OF METAL
DYES DISPERSING PROCESS
THEORY OF DYEING
THEORY OF DYEING
• There must be some attraction force between dyes and fiber so that dyes transfer from bath to fiber. In other words, dyes likes more fiber compare to water so it transfer from water to fiber surface.
• Diffusion occur because concentration of dyestuff become higher than inner surface of dyestuff.
• Depending on the fiber and dyes, binding forces differ from fiber to fiber and dyes to dyes..
• Wash off is just opposites of dyeing, so whatever we have done during dyeing, we shall have to do just opposite work for washing.