SOME OF THE GENERAL PROBLEMS AND THEIR CAUSES FOUND DURING DYEING

CAUSES

08

VARIATION OF SHADE

i)     DYES UNSTABILITIES.

ii)    DYES SENSITIVITIES TO METAL IONS.

iii)   USE OF HARD WATER.

iv)   DIFFERENT CHEMICAL NATURE COMBINATION.

v)    DIFFERENT LIQUOR RATIO.

vi)   UNSUITABLE DYE COMBINATION.

 

09

DIFFERENCE IN SHADE

i)     DIFFERENT DYE PICK-UP.

(CONCENTRATION)

ii)    DIFFERENT NATURE OF DYES.

iii)    DIFFERENT DYEING PROGRAM.

iv)   DIFFERENT SATURATION POINT.

 

10

PRECIPITATES IN THE DYE

i)     DIFFERENT CHEMICAL NATURE.

BATH

ii)    DIFFERENT SOLUBILITY OF DYE.

iii)    STABILITY AT DIFFERENT TEMP.

 

11

POOR LIGHT FASTNESS, WEB

i)     DIFFERENT SATURATION OF DYEING AND

& RUB FASTNESS

       PRINTING OF DYES.

ii)    CATALYTIC FADING DUE TO UNSUITABLE DYE

       COMBINATION.

iii)    DIFFERENT CHEMICAL PROPERTIES OF DYES.

iv)    THERMO MICRATION DUE TO FINISHING.

V)     DUE TO DIFFERENT CHEMICAL NATURE OF

        FINISHING AGENT.

 

12

SINGEING MARKS

i)     AS A RESULT OF SINGEING BEFORE DYEING FIB-

       RES TIPS EXHIBIT HIGHER AFFINITY FOR DYES.

 

13

CHANGE OF SHADE

i)     DYE IS SENSITIVE TO METAL IONS.

ii)    DIFFERENCE IN ACIDITY / ALKALINITY.

iii)   IONIC NATURE OF FINISHING CHEMICALS.

 

14

SPECKS

i)     DUE TO SALT DEPOSITION.

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