Styles of Printing or Printing Styles

Printing:
Printing is the method of localized application of dyes or pigments that produce particular color effect on fabric according to design. The difference of this process with dyeing is the overall/throughout coloration where as printing is only localized coloration.

Styles of Printing:
The various processes by which fabrics are printed with different types of chemicals are meant the styles of printing or print style. There are various styles of printing available among which following are the most important.

  A. Direct style
  B. Discharge style
  C. Resist style

A. Direct printing style:
The direct style is the easiest and least expensive of the three main printing styles. It involves the printing of a pattern with dyes directly onto white fabric. This style is suitable for the printing of both simple and complicated designs; color matching with the original design is also easy. Thereby, this is the most popular and most extensively used style for mass produced printed fabrics.

B. Discharge style of printing:
The literal meaning of the word “discharge” is to eliminate or to remove. It means the style of printing which can produce a white or colored effect on a previously dyed fabric ground.

This discharging of color from previously dyed ground is carried out by a discharging agent, which is capable of destroying color by oxidation and reduction.

The discharging agents are – oxidizing agent (i.e. Potassium chlorate, Na-chlorate etc.) or reducing agent (i.e. Rongalite-c, Stannous chloride etc.)


You can read:  What is Discharge Printing? | Discharge Printing Methods

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ypes of discharge printing style:
2 types of discharging styles are available. White discharge and colored discharge.

a. White discharge:
The fabric is dyed with certain class of dye and then printed (according required design) with a print paste containing “Reducing agent” (usually “Rongolite C”) with no dyes. After printing, the fabric is steamed. The reducing agent on the printed portion destroys the ground color and thus produced a white on base color.

White color discharge printed fabric
Fig: White color discharge printed fabric
b. Color discharge:
The fabric is dyed with certain class of dye and then printed (according to required design) with a print paste containing “Reducing agent” (usually “Rongolite C”) with dyestuff. After printing, the fabric is steamed. The reducing agent on the printed portion destroys the ground color and due to the presence of dye in print paste, the new color is replaced with the design area. Thus it produces a color-color combination.

C. Resist style of printing:
The literal meaning of the term “Resist” is to prevent or to hinder. A resist (wax or other resinous substance) solution is applied according print design that will prevent the fixation of any coloring agent employed after words on that area.

It is one of the oldest printing style in which two resulting pattern can be obtained. In resist printing the fabric is first printed with an agent that resists either dye penetration or dye fixation. During subsequent dyeing, only the areas free of the resist agent are colored.


Types of resist printing style:
2 types of resist styles are available. White resist and colored resist.

a. White resist:
No color is added to the resist print paste. After printing according to design the fabric dried and then dyed so the unprinted portion will be dyed. The printed portion will be un-dyed. Thus it gives a color-white combination.

White and color resist printed fabric
Fig: White and color resist printed fabric
b. Color resist:
Required color is added to the resist printing paste. After printing according to design the fabric dried and then dyed so the unprinted portion will be dyed according to dye’s color and the printed portion will be printed according print paste color. This it gives a color-color combination.