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ROLLER PRINTING

ROLLER PRINTING

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ROLLER PRINTING

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  1. INVENTOR : JAMES BELL FROM SCOTLAND PATENT: 1783 COMMERCIAL USE: 1785 FIRST PRODUCTION MACHINE FOR TEXTILE PRINTING POPULAR TILL 1985 (TWO CENTURIES) POPULARITY DECREASED AFTER THE DISCOVERY OF ROTORY SCREEN PRINTING MACHINE IN 1960 PRESENT POSITION: OBSOLETE. CONTINUOUS PRINTING PRODUCTION SPEED: 70-80 M/MIN No. OF COLOURSIN DESIGN: 1-12 ROLLER PRINTING

  2. ROLLER PRINTING MACHINE

  3. A - HOLLOW CENTRAL DRUM B - LAPPING C - ENDLESS PRINTING BALNKET D - BACK GREY E - FABRIC TO BE PRINTED F - ENGRAVED DESIGN ROLLER G - FURNISHING ROLLER H - COLOUR BOX J - COLOUR DOCTOR K - LINT DOCTOR ROLLER PRINTING MACHINE

  4. MULTI COLOUR ROLLER MACHINE

  5. MANUAL AUTOMATIC FLAT BED ROTARY SCREEN PRINTING SCREEN PRINTING

  6. MODIFIED VERSION OF STENCIL PRINTING DEVELOPED IN ENGLAND AROUNT 1830 - 1840 PRACTICED IN USA AROUND 1900 INDIA AROUND 1926 MOST POPULAR IN INDIA AMONGST SMALL SCALE PRINTERS MANUAL SCREEN PRINTING

  7. SCREEN PRINTING TABLE TABLE TOPPED WITH JUTE FABRIC AND BACK GREY CLOTH WAX TOP TABLE TABLE TOPPED WITH REXIN CLOTH OR POLYESTER FILM COATED WITH STICKER ADHESIVE SCREEN FRAMES WOODEN METAL ESSENTIAL REQUIREMENTS

  8. SCREEN FABRIC/BOLTING CLOTH SILK NYLON POLYESTER FABRIC MESH 100X100, 140X140, 300X300 etc COMMERCIAL DENOMINATION NUMBERS LIKE 12, 16, 18, 25, 40 etc ESSENTIAL REQUIREMENTS

  9. SQUEEGEE RUBBER BLADE FIXED WITH WOODEN HANDLE AMOUNT OF PRINT PASTE TRANSFERRED DEPENDS ON PRESSURE APPLIED RUBBER HARDNESS SQUEEGEE PROFILE : ROUND, SHARP ESSENTIAL REQUIREMENTS

  10. SELECTION OF BOLTING CLOTH NATURE OF DESIGN FABRIC TO BE PRINTED LOW MESH: FOR BLOTCH DESIGN AND THICK/COARSE FABRIC TO BE PRINTED HIGH MESH: FOR FINE DESING AND FINE FABRIC TO BE PRINTED BOLTING CLOTH FIXATION ONTO SCREEN DRUM TAUT/PERFECTLY STRETCHED WOODEN FRAME METAL FRAME PREPARATION OF DESIGN SCREENS

  11. DIRECT PAINTING PHOTOCHEMICAL PROCESS PRINCIPLE COATING OF SCREEN WITH PHOTOSENSITIVE EMULSION EXPOSURE OF SCREEN IN CONTACT WITH COLOUR SEPARATION EXPOSURE TO LIGHT INSOLUBILIZATION OF PHOTOSENSITIVE EMULSION ON EXPOSURE TO LIGHT WASHING SOLUBLE EMULSION DESIGN TRANSFER ONTO SCREEN

  12. POLYVINYL ALCOHOL 10% 900 gm POLYVINYL ACETATE 100 gm AMM. DICHROMATE 10 gm PHOTOSENSITIVE EMULSION

  13. COLOUR SEPARTION SEPARTE SCREEN FOR EACH COLOUR IN DESIGN MASTER DESIGN DESIGN REPEAT DEIGN FITTING MARKS MANUAL COLOUR SEPARATION CAD COLOUR SEPARATION EACH COLOUR SEPARTION IN BLACK INK. STEPS INVOLVED

  14. 2. FIXING THE BOLTING CLOTH ON FRAME 3. WASHING WITH DETERGENT 4. DRYING 5. COATING WITH PHOTOSENSITIVE EMULSION 6. DRYING IN DARK 7. TRANSFER OF DESIGN 8. REMOVAL OF UNEXPOSED PHOTOSENSITIVE EMULSION BY WASHING 9. HARDENING WITH SYNTHETIC LAQUER 10. RETOUCHING FOR PIN HOLES 11. READY TO USE STEPS INVOLVED