SOME OF THE GENERAL PROBLEMS AND THEIR CAUSES FOUND DURING DYEING

CAUSES

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DIMENSIONAL STABILITY

i)     INADEQUATE SETTING OF FIBRE.

(SHRINKAGE)

ii)    LENGTHWISE DISTORTION DURING

       MERCERISING AND DYEING.

iii)   RELAXATION DURING BLEACHING

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CREASING

i)     DURING SCOURING AND HEAT SETTING.

ii)    DUE TO TIGHT WOVEN FABRIC.

iii)    UNEVEN BATCHING OF FABRIC.

iv)   MECHANICAL FRICTION.

 

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MORE EFFECTS

i)     INADEQUATE SETTING AND BATCHING.

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PILLING (STAPLE FIBRES)

i)     INCONSISTENT DIMENSIONAL STABILITY DUE

       TO SHRINKAGE.

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DARK OR PALE SELVEDGES

i)     ONE SIDED LIQUOR FEED.

ii)    ALKALI RESIDUES IN THE GOODS.

iii)    UNEVEN TEMPERATURE IN MACHINE.

 

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SPOTS

i)     DUE TO CONDENSATION DROPS.

ii)    FOAM SPOTSDUE TO PADDING.

iii)   ALKALI RESIDUES IN THE GOODS.

 

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ENDING

i)     DYE SUBSTANTIVITY.

ii)    DYE SEDIMENTATION.

iii)   POOR PENETRATION.

iv)   MIGRATION.

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