SOME OF THE GENERAL PROBLEMS AND THEIR CAUSES FOUND DURING DYEING

CAUSES

01

ENDING PROBLEMS

i)     POOR DYES DISPERSION.

 

ii)    UNSUITABLE DYE COMBINATION.

 

iii)   WRONG DYEING METHOD.

 

02

CLOUDY DYEING

i)     INADEQUATE PRETREATMENT (IN BLEACHING).

ii)    IRREGULAR WINDING.

iii)   WRONG LOADING OF ROBBINS (OVER LOAD -

        TIGHT WINDING).

iv)   IMPROPER LIQUOR CIRCULATION.

v)    IMPROPER LIQUOR TO MATERIAL RATIO.

vi)   FOAMING DURING DYEING.

vii)  WRONG DYEING METHOD.

 

03

PALE AREAS

i)     IMPROPER DESIZING AND BLEACHING.

ii)    SALT DEPOSITION DURING BLEACHING.

iii)   IMBALANCE OF LOADED MATERIAL.

 

04

BARRINESS

i)     VARIATIONS IN TEMPERATURE DURING FIBRE -

        MANUFACTURING (TEXTURING).

ii)    VARIATIONS IN DENSITY OF THE MATERIAL.

 

05

SKITTERNESS

i)     INADEQUATE PRETREATMENT (e.g. DESIZING).

ii)    DIFFERENT FIBRES.

iii)   POOR PENETRATION.

iv)   POOR SOLIDITY OF FIBRE BLEANDS.

v)    TENSION DURING WEAVING, KNITTING AND

        MERCERISING.

 

06

LISTING

i)     DIFFERENT SETTING TEMP.

ii)    TENSION DURING WEAVING, KNITTING,

        MERCERISING AND IMPROPER ROLLED OF

        SELVEDGES.

 

07

PALE AREAS AFTER DYEING

i)     DUE TO VAPOURS OF ACID, CHLORITE

        FORMALDEHYDE.

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