Common problems of pigment printing
Poor Wash Fastness:
Inadequate curing conditions Insufficient binder content for the amount of pigment used
Lack of fixing agent Poor penetration of print paste Poor quality pigments

Poor Rubbing Fastness:
Inadequate curing conditions Poor quality of the binder used
Lack of fixing agent Poor quality pigments

Inadequate Selection of Pigment May cause:
Poor dry cleaning fastness Poor light fastness Poor fastness to benzoyl peroxide
Poor fastness to heat( colour change when curing pale shades)
Poor wash fastness( staining of no-printed sections)

Gelling of the Print Base and Screen Blockage:
Premature cross linking of the binder due to drop in PH
Paste containing a fixing agent have been kept for too long
Incompatibility of components in the printing base

Unevenness of Prints-Poor colour Yield:
Inadequate selection of thickener Inadequate selection of surfactants(emulsifiers)
Poorly prepared fabric

Thinning Of the Print Paste:
Bacterial contamination Incompatibility of ingredients in the printing base Inadequate selection of thickener

Flushing or Poor line Definition:
General cause is ill prepared fabric with presence of excess electrolytes or surfactant agents
Inadequate section of thickener

Stiff Handle:
Excess of binder/cross linking agent
Poor quality of the binder
General Fastness Requirements and Printing Properties

Related to Printing System:
Washing(machine washing), Rubbing(dry & wet), Scrubbing, Handle, Alkaline Perspiration, Line Definition, Penetration, Colour Yield/Brightness, Screen Blocking, Eco issue

Related to Pigment:
Light fastness, Heat Fastness, Dry Cleaning Fastness, Washing, Alkaline Perspiration, Benzoyl Peroxide, PVC Coating, Rub Fastness

Inappropriate selection of pigments:
pigments should be carefully selected according to end use requirements, particularly reds for light pink shades, to prevent yellowing of shade when curing and fastness to dry cleaning, especially if pale shades are to be printed.
These recipes should be seen as guidelines only, lab tests must be performed before bulk production.

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