1 decals by gerry cole version 10/6/08. 2 decal development traditional silk screen decals dry...
Post on 31-Mar-2015
Embed Size (px)
- Slide 1
1 Decals By Gerry Cole Version 10/6/08 Slide 2 2 Decal Development Traditional Silk Screen Decals Dry Transfer Letraset INT Process Intermediate Transfer Process ALPS Printers MD-1000 MD-5000 Kodak First Check Printer Digital Silk Printing Ink Jet Printers Laser Printers Slide 3 3 Silk Screen Decal Paper with water-based adhesive Print inks through silk screen Print lighter colors first Registration problems Paper expands with humidity Second and following colors dont match first one across the entire sheet, some sheets are bad Apply lacquer clear coat Plasticizer in lacquer Too brittle - cracks Too flexible - stretches Slide 4 4 Silk Screen Decal Summary Decal clear coat Too thick or too thin (fragile) Proper amount of plasticizer for modeling uses Exposure to humidity changes during storage Paper expands and contracts, while Clear coat doesnt, therefore Clear coat cracks during water immersion Adhesive changes color brown or yellow Chemical reaction in the adhesive layer Exposure to UV helps restore To trim or not to trim? Even split within the club Slide 5 5 Dry Transfer Dry Transfer is a term used to describe decals which can be applied without the use of water or other solvent Zip-A-Tone, Chart-Pak, Letratone, Letraset Flexible transparent backing Printed decal Wax adhesive layer Apply pressure to release Push into model surface Slide 6 6 Letraset INT Process Uses solid color Dry Transfer sheet Yellow, red, blue, silver, gold, black, white, green plus custom colors matched to PMS # White background under lighter colors Need photo negative of desired artwork Expose Dry Transfer sheet under negative Develop Dry Transfer Wash away all but desired image Use as normal Dry Transfer High quality, 300 dpi possible Slide 7 7 Letraset INT Process Custom providers available Stamford Type & Color STC Example, for single color per sheet Process 8 by 10 sheet, one of 16 colors, $49.75 Negative from your artwork $20.00 Custom mix color, 8 by 10, $79.75 Matched to PMS standard colors Provides 24 hour turnaround Suggest you use decals within 30 days Check web for other vendors Slide 8 8 Letraset Intermediate Transfer Since the Dry Transfer decal is under the flexible transparent backing, you cant color the image or modify it before application Intermediate Transfer lets you apply the decal to a special transfer medium Decal may be colored with ink pen or spray Transfer decal back to a flexible transparent backing Apply colored decal as any Dry Transfer Outdated today, but it did work! Slide 9 9 Dry Transfer Summary No silvering problems no clear coat! Wax adhesive dries out, decal wont release Renewal spray only partially effective Try Microwave for a few seconds heats wax Alignment difficult Transparent plastic backing sheet stretches with use of adjacent decals Hard to apply to curved parts May not adhere well to rough surfaces Apply Dry Transfer to clear decal film Probably the simplest solution for alignment problems Slide 10 10 Alps Printers MD-1000 Micro-Dry technology 300 or 600 dpi Prints well on regular decal papers 8 by 10 print area Ink colors Cyan, Magenta, Yellow, Black (CMYK), White Metallic Silver, Gold, Cyan, Magenta Finishing - Clear Gloss MD-5000 Slide 11 11 Alps Printer MD-5000 Added bright silver and gold foil print capability Update kit for Thermal Dye Sublimation printing Both versions have a variety of print modes Business Graphics Graphic Art Photographs Monochrome Photo Text Spot Color Metallic Slide 12 12 Alps Printer Color printing MD-1000 Holds up to 4 ink cartridges, CMYK (K=black) ALPS reads the bar codes on the cartridge to identify color CMYK inks are transparent, need white background Overlay Mode Print spot color first (usually white) Print second color with CMYK or Black Seal colors with Finishing Clear Halftone or Dither Amount of offset of colored dots not visible to the eye Superfine, fine, standard, course, or no halftone Photo Realistic print mode uses superfine dither Consider all the preceding as only a Guide Slide 13 13 ALPS Printer Summary Horizontal Banding a problem Very common on MD-1000, less so on MD-5000 Factory alignment no longer an easy option Prints very well on decal paper Need to cut out image without cracking decal paper at the cut edge Apply protective layer to decal? Adds to thickness and reduces flexibility Reduces chance for scratches in the colors Use only same base as original decal clear coat Microscale Decal Film usually very safe However, some colors still just dont reproduce well at all (greens, yellow, orange) Slide 14 14 Kodak First Check Up to 9 ink cartridges Micro-Dry ALPS inks CMYK New Orange, Green Bright foil silver and gold Dull silver and gold White Black Finish coat gloss Dithering like ALPS Slide 15 15 Kodak First Check Since ALPS printers read cartridge bar code Can swap ALPS and First Check ink cartridges Replace bar code strip Why? ALPS cartridges getting very hard to find Good oranges and greens now possible Banding less a problem than with ALPS Expensive >> $2,500 BUT, Actually printing a decal with ALPS of First Check still a VERY time consuming process Slide 16 16 Digital Silk Outsource decal printing Prints an opaque white Wide range of colors available But selecting exact colors largely trial and error No metallic films can be printed Less labor-intensive for decal developer Concentrate more on new decal designs DRAWDecals, Two Six, (UK), Model RR + others converting to Digital Silk Slide 17 17 Laser Printers No white toner available Color Laser printers very expensive Prints on clear or white decal sheet Elevated temperature of toner fixer roller can melt the decal sheet and cause a messy (and costly) jam Image can flake off the clear decal sheet Attractive for Black decals Slide 18 18 Ink Jet Printers White ink not available Relatively inexpensive Prints on special clear decal sheet Ink Jet inks are normally absorbed by paper wont work well on conventional decal papers without modifications to the printer Decal papers available in clear and white A final clear coating required to protect the ink Even when using special decal paper Inks are translucent, apply over white paint or decal Some club members have had good success Slide 19 19 The End