Textile Dyeing and Printing

Dyeing and printing processes are employed in the conversion of raw textile fibers into finished goods that add much to the appearance of textile fabrics.

DYEING

Dyeing is the application of dyes or pigments on textile products such as fibers, yarns, and textiles with the goal of accomplishing color with preferred color fastness. Dyeing is usually done in a special option consisting of dyes and particular chemical product.

Dye particles are fixed to the fiber by absorption, diffusion, or bonding with temperature level and time being vital managing elements. The bond between dye particle and fiber may be solid or weak, depending on the dye made use of. Dyeing and printing are different applications; in printing, color is applied to a local location with desired patterns. In dyeing, it is related to the whole textile.

The main source of dye, historically, has been nature, with the dyes being drawn out from animals or plants. Considering that the mid-19th century, however, people have actually created synthetic dyes to accomplish a wider range of colors and to render the dyes extra stable to washing and general use. Various classes of dyes are utilized for various sorts of fiber and at different phases of the textile manufacturing procedure, from loose fibers via yarn and towel to complete garments.

 

Polymer fibers are dyed with fundamental dyes, while nylon and protein fibers such as wool and silk dye with acid dyes, and polyester thread is colored with disperse dyes. Cotton is dyed with a series of dye types, consisting of barrel dyes, and contemporary synthetic reactive and direct dyes.

THERE ARE THREE CATEGORIES:

•Cellulose fiber dye.
•Protein fibers dye.
•Synthetic fibers dye.

THERE ARE MANY CLASS OF DYE IN THE FOLLOWING:

•Reactive dye:
•Disperse Dye
•Direct Dye
•Basic dye
•Acid dye
•Sulphur dye.
•Vat dye
•Azoic Dye
•Oxidation dye
•Optical dye or Fluorescent
•Solvent Dye

METHODS OF DYEING

•Direct Dyeing
•Stock Dyeing
•Top Dyeing
•Yarn Dyeing
•Skein Dyeing
•Package Dyeing
•Warp Beam Dyeing
•Garment Dyeing

ADVANCES TECHNOLOGIES OF DYEING

•Advanced DENIM concept
•Supercritical fluid dyeing (SFD)
•Ultrasound technology
•Powder dyes from textile fibers
•DyeCoo

PRINTING

Printing is a process of decorating textile fabrics by application of pigments, dyes, or various other associated materials in the form of patterns. Although apparently developed from the hand paint of materials, such approaches are also of great antiquity. There is evidence of printing being carried out in India throughout the 4th century BCE, and a printing block dated at about 300 CE has been discovered in the burial grounds of Akhmīn in Upper Egypt. Textile printing has actually ended up being highly sophisticated and has involved the skills of several musicians and designers.

 

The four major methods of textile printing are block, roller, display, and heat transfer printing. In each of these approaches, the application of the color, usually as a thick paste, is followed by fixation, usually by steaming or home heating, and afterwards removal of excess colour by cleaning. Printing styles are classified as direct, discharge, or stand up to. In straight printing, coloured pastes are published straight on the cloth. For discharge printing, the cloth is first dyed with a background color, which is ruined by reagents, or lowering representatives, lugged in a print paste.

This activity may leave the released design white on a tinted history, although print pastes might additionally consist of tinting matters not destroyed by the discharging representative, generating a colored design. In the resist process, the cloth is first published with a compound called a withstand, safeguarding these published locations from accepting color. When the cloth is colored or pigment cushioned only those components not published with the withstand are colored. A special application of this strategy, passing on plissé results, is the printing of the fabric with a resist, complied with by therapy with caustic soda.

TYPES OF TEXTILE PRINTING:

•Block printing
•Roller printing
•Heat transfer printing
•Digital Printing
•Screen Printing
•Flexography printing
•Litho Printing
•Engraving
•Embossing
•Embroider Printing

ADVANCES TECHNOLOGIES OF PRINTING

•Nanotechnology for printing
•Water-based printing
•Smart Cutting for B1 and B2 formats
•Biodegradable printer inks
•Conductive inks
•3D Printing

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