Properties of DIRECT DYE

 

Properties of DIRECT DYE
MECHANISM	Hydrogen Bonding. Vander Waal’s Forces between Fiber Surface and Dye Molecule. Larger Molecule Size.
SOLUBILITY	Soluble in Water. Good Affinity. Polar Nature.
CHARGEABILITY	Carry Negative Charge. Discharge by Adding Salts, i.e. Na2SO4 , CuSO3
SUBSTANTIVITY	Moderate Substantivity for the Fiber because of Larger Size of Molecule. pH Range: 10 - 11
FASTNESS PROPERTIES	Washing        :   Weak   Rubbing        :    Poor Lightening    :    Good Chemical       :    Poor Perspiration  :    Average
APPLIANCES	They are Applicable on Cellulosic and Proteinic  Fibers; i.e. Viscose, Silk.
COLOUR RANGE	Large Range of Colors. Dull and Darker Shades. All Colors are Achievable.
ENVIRONMENT BEHAVIOUR	Non-Environmental Friendly. Carcinogenic Dye.