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By Gerry Cole Version 10/6/08

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1 By Gerry Cole Version 10/6/08
Decals By Gerry Cole Version 10/6/08

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

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 don’t match first one across the entire sheet, some sheets are “bad” Apply lacquer clear coat Plasticizer in lacquer Too brittle - cracks Too flexible - stretches

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 doesn’t, 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

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

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

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

8 Letraset “Intermediate Transfer”
Since the Dry Transfer decal is “under” the flexible transparent backing, you can’t “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!

9 Dry Transfer Summary No “silvering” problems – no clear coat!
Wax adhesive dries out, decal won’t 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

10 Alps Printers MD-1000 300 or 600 dpi
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

11 Alps Printer MD-5000 Both versions have a variety of print modes
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

12 Alps Printer Color printing – MD-1000 Overlay Mode
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”

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 don’t reproduce well at all (greens, yellow, orange)

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

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

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

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

18 Ink Jet Printers White ink not available Relatively inexpensive
Prints on special clear decal sheet Ink Jet inks are normally absorbed by paper won’t 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

19 The End

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