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Showing posts with label Printing and Finishing. Show all posts
Showing posts with label Printing and Finishing. Show all posts

Sunday, July 24, 2011

Printing Style | Style of Printing | Different Types of Printing Style | Direct Printing Style | Discharge Printing Style | Resist Printing Style


A process for producing a pattern on yarns, warp, fabric, or carpet by any of a largenumber of printing methods. The color or other treating material, usually in the form of a paste, is deposited onto the fabric which is then usually treated with steam, heat, or chemicals for fixation. 
There are three different printing 'styles' used to produce patterned effects on textiles, these being termed direct, discharge and resist. Each of these will be described in turn.

Printing Method | Method of Printing | Printing Processes | Different Types of Printing Method | Block Printing | Roller Printing | Screen Printing | Transfer Printing | Heat Transfer Printing | Ink-Jet Printing | Carpet Printing | Warp Printing | Resist Printing | Photographic Printing | Pigment Printing | Blotch Printing | Burn-Out Printing | Direct Printing | Discharge Printing | Duplex Printing

Printing Processes:There are five main methods of printing a fabric, these being the block, roller, screen, heat transfer and ink-jet methods. The heat transfer method differs from the others in that it involves the transfer of color from the design printed on paper through the vapour phase into the fibres of the fabric.

Friday, July 22, 2011

Washing Fastness | Wash Fastness | Description of Washing Fastness | Types of Washing Fastness


Color fastness is the ability of fabrics to retain the dyes used to color them. Some fabrics hold dye within their fibers extremely well - like denim - while others do not (mostly synthetic or artificial non-natural fabrics) and tend to "bleed" when they are washed. The denim would therefore be more "color fast" than the other fabric.

The resistance of a material to change in any of its color characteristics, when subjected to washing is called color fasntess to washing.

Tuesday, July 19, 2011

Definition of Flat Screen Printing | Advantages of Flat Screen Textile Printing | Screen Printing Technology | Heat Transfer Printing | Advantages of Transfer Printing | Disadvantages of Transfer Printing

Flat-screen and rotary-screen printing are both characterized by the fact that the printing paste is transferred to the fabric through openings in specially designed screens. The openings on each screen correspond to a pattern and when the printing paste is forced through by means of a squeegee

Discharge Printing | Resist Printing | What is Discharge Printing | Discharge Printing Process | After-Treatment of Discharge Printing

It is possible to speak of discharge printing, if in the fixation process that follows the application of the printing paste there is local destruction of a dye applied previously. If the etched (discharge), previously dyed area becomes white, then the process is called white discharge.

Textile Printing | What is Textile Printing | Pigment Printing | Process of Textile Printing | Printing Paste Preparation

Textile printing involves the production of a predetermined coloured pattern on a fabric, usually with a definite repeat. It can be described as a localised form of dyeing, applying colorant to selected areas of the fabric to build up the design.Textile Printing, like Textile dyeing, is a process for applying color to a substrate. However, instead of coloring the whole

Friday, June 3, 2011

Ink Jet Printing | Digital printing Process





Properties Required of Ink-Jet Dyes:
The two major classes of colorants, namely dyes and pigments. The choice of dye depends upon the ink used, whether it is aqueous, solvent or hot-melt and on the type of printer (thermal or non thermal). However irrespective of the solvent system, all ink-jet dyes have to satisfy a number of stringent criteria.

Wednesday, June 1, 2011

Different Types of Auxiliaries and Ingredients Used in Textile





Here is some Textile Auxiliaries which are frequently used in Textile for Different purposes.


Anionic Surfactant of Textile:  

These are basically Sulphonated Fatty Amide or Alkail Arail Sulphonate compounds. It is used as a strong detergent for scouring of cotton, silk fabrics.

Nonionic Surfactant: 

These are basically an Ithailin Oxide Condensate detergent which is nonionic and are used to scouring, wetting, dispersing, emulsification, dust removal materials of Textiles.

Saturday, May 7, 2011

Discharge style printing process | Discharging agents





 Discharge styles have been important since the earliest days of textile
printing..With any industrial process there must be sound technical and commercial reasons for
its conception and continuation. In the case of discharge printing, the following
considerations determine the usefulness of the process compared with other printing
techniques.

Friday, May 6, 2011

Definition of Textile Steamer | Types of Textile steamer



STEAMERS
Printed dyes are usually fixed by steaming processes, the steam providing the moisture
and rapid heating that brings about the transfer of dye molecules from the thickener film to the fibre within a reasonable time.

Historically, the process of developing printed mordants was known as ‘ageing’ and
took a long time, as the term implies. Printed fabric was draped over poles and left in a room with a warm and humid atmosphere for some days, allowing the processes of diffusion and chemical reaction to occur.
The time and conditions for fixation in steam vary with the properties of the dyes
and fibres used, ranging from 10 s to 60 min in steam at 200 to 100 °C.

Thursday, May 5, 2011

Definition and Advantages of Transfer Printing Process






Transfer printing is the term used to describe textile and related printing processes in
which the design is first printed on to a flexible nontextile substrate and later
transferred by a separate process to a textile. It may be asked why this devious route
should be chosen instead of directly printing the fabric. The reasons are largely
commercial but, on occasion, technical as well and are based on the following
considerations.

Thursday, April 7, 2011

Defination, Properties and Uses of Printing Thickeners




Thickener or Print pastes are traditionally made by weighing out and, if necessary, dissolving the
colorants and auxiliary chemicals and then stirring them into the required weight of
pre-prepared thickener. A thickener is a colourless, viscous paste made with one or
more thickening agents. The use of terms such as thickener, and thin, long or short, to
describe print pastes is of course descriptive rather than scientific, but is long
established and a useful reminder that the materials being handled possess complex
properties, not easily defined.The thickener must be stable and compatible with the dyes and auxiliaries to be used.

Monday, March 21, 2011

Description of textile Finishing Process



Textile Finishing  is a process used in manufacturing of fiber, fabric, or clothing. In order to impart the required functional properties to the fiber or fabric, it is customary to subject the material to different type of physical and chemical treatments. For example wash and wear finish for a cotton fabric is necessary to make it crease free or wrinkle free. In a similar way, mercerising, singeing, flame retardant, water repellent, water proof, antistatic finish, peach finish etc are some of the important finishes applied to textile fabric.

Pretreatment of Textile Dyeing & Printing





Natural fibers and synthetic fibers contain primary impurities that are contained naturally, and secondary impurities that are added during spinning , knitting and weaving processes.Textile pretreatment is the series of cleaning operations.All impurities which causes adverse effect during dyeing and printing is removed in pretreatment process.

Sunday, March 6, 2011

Working Process of Rotary Screen Printing Machine




Rotary screen printing machine

Screen printing is sprinting technique that uses a woven mesh to support an ink-blocking stencil. The attached stencil forms open areas a of mesh that transfer ink or other printable materials which can be pressed through the mesh as a sharp-edged image onto a substrate. A roller or squeegee is moved across the screen stencil, forcing or pumping ink past the threads of the woven mesh in the open areas.
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