1.

Explain any one of the following with its advantage and disadvantage: i. Transfer Printing ii. Roller Printing

Answer»

(1) Transfer printing: In this indirect style of printing, dyes are transferred from paper to a thermoplastic fabric under controlled conditions of temperature, time and pressure. The image is first engraved on a copper plate and then pigment is applied on these plates. The image is then transferred to a piece of paper. The paper is then placed on the fabric and heat pressure is applied to fix the image on the fabric.

Advantage:

  • Simple operation 
  • No after treatment of fabric required 
  • Excellent print quality 
  • Excellent design possibility

(2) Roller printing: In this method engraved copper cylinders or rollers are used in place of hand carved blocks. The required designs are engraved on the surface of copper roller, to which dye is applied and excess colour is scraped off the roller’s surface, leaving dye in the engraved sections. When rollers come in contact with a fabric, the dye on the roller gets transferred to the fabric surface.

Advantage:

  • Large quantity of fabric can be produced using this method of printing. 
  • Due to precision achieved in aligning the roller, repeats marks are not visible and hence clear designs are achieved.


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