Section outline
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Advantages of Inkjet technology and justification for further investment in research and development:
- “Quick response” – sort time answer on market and customer demands.
- Decrease of pre-printing costs (elimination of screen preparation phase as well as screen storage, which enables the capital financial savings. The digital technology does not require additional space for storage since the patterns and all the production dana are saved in computer CAD/CAM data bases).
- Number of colors and pattern size are practically unlimited which allows greater designer freedom and pattern reproduction in large number of repetition with constant colour reproduction quality.
- Production errors are minimized (in compare to analogue printing techniques)
- Optimal consumption of printing pastes (in analogue printing techniques the printing paste consumptions are much higher as well as the amount of waste printing paste)
Limitations and disadvantages of Ink Jet technology in textile printing
- Because of complex interaction of specific surface – structure textile characteristics, demands on composition and rheology properties of printing inks and the technology of ink droplet formation, there are still certain barriers and limitation.
- Problem of textile surface – structure characteristic influence on colour dot formation, dye penetration and capillary diffusion of dye,
- Problem of porosity of textile material,
- Problem of modification and adaptation of dyestuff and printing ink components, for usage in digital printing technology
- Problem of equipment technical requirements which additionally complicate the optimization of textile printing inks for digital production,
- Optimization of textile pretreatment and finishing phase as key phases in application of textile dyestuff based printing inks (example: printing paste based on reactive textile dyestuff).
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All over printing started its journey in our garment industry from the 80’s. Although initially roller printing technique was prevalent, later flatbed and rotary screen printing techniques gained popularity. Peoples tastes, preferences and needs are changing with the change of era. Especially today’s young society is much more aware of their dress and fashion. Therefore, the demand for all over printing is increasing day by day all over the world including Bangladesh. There are many more products including t-shirts, shirts, pants, three-piece, bed-sheets and so on where all over print is being used. However, there are several limitations to the methods of all over screen printing, one of which is all kinds of design can not be printed by using flatbed or rotary screen printing method. All though it is possible to print 1-20 colors by those methods, usually more than 12 colors are not printed, the main reasons are two: 1) Print cost is high & 2) Machine complexity. Also, the photo print and effect of 3D cannot be clearly highlighted through screen printing methods. A new chapter has been added to the printing industry to overcome all these various problems, that is Digital Textile Printing.