Printing paste

Colouring matter and thickener
Other auxiliaries
Acid dye for Silk
Disperse dye for Polyester
Reactive dye for Cotton

The following auxiliaries are used in
printing:-
 Wetting agent
 Dispersing agents or solvents
 Antifoaming agent
 Hygroscopic agent
 Oxidizing and reducing agent
 Carriers
 Binders
 After washing agents
 Miscellaneous auxiliaries
 Thickeners

Functions:
 Attraction of dyestuff to the fiber due to
presence of auxochrome.
 To achieve color effect on the fabric.
 To produce required shade.
Example: Vat, Azoic, Reactive, Direct dye etc

Functions:
 To wet the fabric as well as dyestuff.
 To reduce surface tension of water allowing
the dyestuff for easy penetration into fiber.
 To obtain smooth paste.
 To dissolve the dyestuff in the paste.
Example: Olive oil, T.R oil, Caster oil,
Lissapol N, Animal oil, Glycerine.

 Functions:
 To get bright design,
 To assist dye penetration,
 To spread dye molecules evenly in the paste,
 Assist dye fixation,
 To prevent aggregation of dye molecules in the highly concentrated
of the dye.
 To prevent precipitation.
 To increase solubility of the dyes.
 To make proper printing shade.
 Example: Urea, Glycerine, Desirable, Alcohol, Acetone,
Diethylene glycol, Thio diethylene glycol.

Functions:
To prevent the foam generation during
printing.
Example: Silicone, Defoamers,
Sulphated oil, Perminol KB,
Emulsified pine oil.

Functions:
To take up sufficient amounts of water
during steaming to give mobility to dye
molecules
To enable them to transfer to the fibre.
Example: Urea, Glycerine, Diethylene
glycol

Functions:
To develop the final color during steaming
or in the subsequent after treatment.
Assists to dye fixation.
Example: Sodium chlorate, Potasium
chlorate, Sodium nitrate, Resist salt,
Ammonium chlorite, Ludigol, Na or K
dichromate.

Functions:
Used for reduction of different dyes.
Used for mainly in discharge printing.
To destroy color from the ground of fabric.
To make the insoluble dyes to soluble.
Example: Sodium hydrosulphite,
Stanus chloride etc. Rongolite-C.

Functions:
To prevent fiber damage during steaming.
Accelerate the final color development by
oxidation.
Reduce the risk of oxidation.
Example: Copper sulphide, Ammonium
vanadate, Potassium ferrocyanide.

Functions:
To maintain pH.
To develop the color or printed fabric.
To fix dye on the fabric permanently.
Example: Organic acid, Alkali KOH,
NaOH, Na2CO3, Pottasium carbonate,
Sodium bicarbonate, Sodium acetate.

Functions:
 To create the big size holes of the fibers.
 Helps to swell the fiber structure.
 To reduce crystallinity.
 Help the easy penetration of dye molecule inside
the fiber polymer.
Example: Polyethylene glycol, Phenols,
DEGDA (Di-ethylene glycol diacetate)

Functions:
Used for fixing disperse dyes on polyester
or polyester wool blends at temperature
below 105°C.
Example: Diphenol, Ortho-phenol, Tri-
chloro benzene

Functions:
Assist fixation of dyes.
Absorb moisture from air.
Facilitates subsequent washing off.
Example: Urea, Glycerine etc.

Functions:
To remove the thickener from the printed
goods
It helps in developing true shades
Improves fastness
Example: Non-ionic, anionic and
cationic detergent as per dye

Functions:
 To act as a vehicle for carrying the dye onto the
cloth
 To prevent the spreading of the colour on the cloth
by capillary action.
Example: Gum Arabic, Guar gum, sodium
alginate, locust bean gum, synthetic
thickener

 C R Madhu
 Textile Processing Technology
 R C Technical Institute
 Ahmedabad, Gujarat
 crm4chemistry@gmail.com
 https://textilechemrose.blogspot.co
m/
THANK YOU

Printing paste

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Printing paste