1. Md: Mahmudul Alam Sarker ID NO: 151-32-282 Student of the M Sc. In Textile Engineering Program Daffodil International University, Bangladesh.
2. to Advance Garments printing presentation On
3. High Density Printing High- Density Printing the process of printing a specially formulated ink through a very thick stencil to achieve a raised, glossy smooth print with very sharp edges. High density inks allows you to achieve a three-dimensional effect with sharp, well defined outlines. The process is very slow but the end product is unique.
4. High Density Printing This is one of the recent developments in printing which gives thick prints on the surface of garments. Achieved by either giving more number of coats or by using thickener indirect films used for making the screens. High Density is a popular special effect that rises straight up off the shirt and has a hard rubbery feel with sharp edges. A High density print has slight glossy finish.
5. High-Density Printing Process Flow Chart Prepare High-density paste (100%) Fabric/ Garments Pre-Treatment Screen Table/ Machine preparation Fabric Plaited on the table High-density Paste apply by screen Curing at 160 C (Belt speed 3 min/min) Delivery
6. High-Density Printing Technique HD or High Density Printing utilizes advanced technique from an experience screen printer to achieve a unique 2D style finish that is raised from the T-shirt. Correct HD printing isn't just building layers upon layers using normal plastisol ink through a standard coated screen. To achieve the best result, it all comes down to the screen itself. We coat the screen multiple times until we are happy with the thickness of the outside face of the screen, we then use a special film that works with this thicker emulsion. Once our screen is complete, we mix a specially formulated HD ink which will slightly raise but still remain sharp. This process is fairly complex and time consuming but the results speak for themselves.
7. High-Density Printing Equipment's Sample fabric/ T-shirt High density Printing Paste Screen printing machine/ Table Screen with appropriate Mesh Drying & Curing chamber
8. The Inks There are three general types of textile inks (or pastes, as we referred to them in Printing ): 1. Solvent-based inks (Traditional) 2. Water-based inks 3. Plastisol inks (recommended to use in High density print)
9. Plastisol inks Plastisol inks are widely used in garment printing. They are easy to print, do not dry in the screen, can be very opaque on dark garments, and will adhere to most textiles. They are composed primarily of two ingredients, PVC resin (a white powder) and plasticizer (a thick, clear liquid). Plastisol inks have one outstanding characteristic, they must be heated to dry. They will not dry, or cure, at normal temperatures. For a complete cure, they must reach 290-330 F (143-166 C). Plastisol inks do not color the fibers like a dye. Instead the ink wraps around the fibers and makes a mechanical bond with the fabric. For this reason, they will not adhere to non-porous substrates such as plastic, metal, and glass. Health, Safety and Environment friendly.
10. Pantone Approved - Color Matching System : Plastisol Ink Mixing System is the next generation of inks for mixing colors. The PIM system contains 10 primary High Opacity colors and uses only 6 Fluorescent. All colors have wet on wet properties. Recipe book is available for creating shades. With the uses of enhancer additives special effects become simple. Whether matching Pantone or a buyers special color, this system will make matching simple. PIM System will reduce overall cost. The easy of printing will increase production speeds. Application and Substrate: Mixing colors can be printed directly on cotton, cotton/polyester or polyester fabrics. Stencil: Direct, Indirect or Capillary Films NB: When printing on nylon fabric use Long Life Bonding Agent (add 10 to 15% by weight).
11. High Density Inks work best with solid, bold graphic areas such as text or symbols and logos. High Density Inks cannot be used for halftone images or graphics with fine detail.
12. Screen Printing A process, where ink is mechanically applied to a substrate with the use of a screen and squeegee.
13. Mesh count The mesh count is the number of threads per inch (tpi) used to weave the mesh. Typical mesh counts for screen printing range from 85 tpi to 355 tpi. The high mesh counts, have a very small thread diameter and less open area. Prints require more fineness should be use finer mesh count. Hi density printing ink Mesh count 1. Solvnt/Water base (1st & 2nd times) 110 175 Overprint (3rd to 6th times) 80 110 2. Plastisol 125305
14. Screen Printing machine with dryer/ curing chamber
15. Additional Pricing for High Density Garments Quantity 12-23 pes 24-50 pes 51-99 pes 100-199 pes 200-299 pes 300+ pes Additional Cost +$5 per item +$4 per item +$2.50 per item +$1.25 pe r item +.50 per item Call