SOME OF THE GENERAL PROBLEMS AND THEIR CAUSES FOUND DURING DYEING

PROB.NO.	NAME OF PRODUCT	CAUSES
A	UNLEVELNESS	DUE TO BLEACHING AND DYEING CONDITIONS
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.
B	UNLEVELNESS	DUE TO MATERIAL
04	BARRINESS	i) VARIATIONS IN TEMPERATURE DURING FIBRE - MANUFACTURING (TEXTURING). ii) VARIATIONS IN DENSITY OF THE MATERIAL.
C	UNLEVELNESS	DUE TO OTHER REASON
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.
D	REPRODUCIBILITY	DUE TO DYES DYEING METHOD AND FINISHING
		Products
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 (CONCENTRATION)	i) DIFFERENT DYE PICK-UP. ii) DIFFERENT NATURE OF DYES. iii) DIFFERENT DYEING PROGRAM. iv) DIFFERENT SATURATION POINT.
10	PRECIPITATES IN THE DYE BATH	i) DIFFERENT CHEMICAL NATURE. ii) DIFFERENT SOLUBILITY OF DYE. iii) STABILITY AT DIFFERENT TEMP.
E	FASTNESS PROPERTIES.
11	POOR LIGHT FASTNESS, WEB& RUB FASTNESS	i) DIFFERENT SATURATION OF DYEING AND 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.
F	SPOTS / MARKS	DUE TO MATERIAL
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.
G	APPERANCES OF THE GOODS
15	DIMENSIONAL STABILITY (SHRINKAGE)	i) INADEQUATE SETTING OF FIBRE. ii) LENGTHWISE DISTORTION DURING MERCERISING AND DYEING. iii) RELAXATION DURING BLEACHING
16	CREASING	i) DURING SCOURING AND HEAT SETTING. ii) DUE TO TIGHT WOVEN FABRIC. iii) UNEVEN BATCHING OF FABRIC. iv) MECHANICAL FRICTION.
17	MORE EFFECTS	i)     INADEQUATE SETTING AND BATCHING.
18	PILLING (STAPLE FIBRES)	i) INCONSISTENT DIMENSIONAL STABILITY DUE TO SHRINKAGE.
H	OTHER PROBLEMS
19	DARK OR PALE SELVEDGES	i) ONE SIDED LIQUOR FEED. ii) ALKALI RESIDUES IN THE GOODS. iii) UNEVEN TEMPERATURE IN MACHINE.
20	SPOTS	i) DUE TO CONDENSATION DROPS. ii) FOAM SPOTSDUE TO PADDING. iii) ALKALI RESIDUES IN THE GOODS.
21	ENDING	i) DYE SUBSTANTIVITY. ii) DYE SEDIMENTATION. iii) POOR PENETRATION. iv) MIGRATION.