750 Imperial Court • Charlotte, NC 28273
phone: (704) 554-1188 • toll free: (800) 438-1851 • fax: (704) 554-7000
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Often call "raised printing" thermography is a process that combines conventional offset lithography, special inks and a resinous powder. That powder may be colored, clear or metallic. The resin adheres to the ink, with the remainder vacuumed off the sheet. The sheet is moved to an oven where heat melts the resin. This fuses it to the ink and raises the image from the sheet.
The second approach allows four-color thermography. Here is a finished piece is overprinted with a clear varnish, the varnish covering all printed areas. This varnish is then dusted with a clear resin which, once heated for
the correct length of time, the result will be a hard, level surface with an
even color value throughout.
The thermographic image is permanent, chip-proof and crack-proof. It can
be die-cut or it can bleed from the page. Due to the fact that conventional
thermography is a heat process, the heat from a laser printers will often
remelt the powder causing multiple images on the page and leaving a residue
on the drum. Therefore, conventional thermography is not recommended for
use in laser printers.
A new process called "Laser Raised" combines UV light and special UV
activated thermography powder. Once the sheet passes through the heat
tunnel, it is exposed immediately to UV light. This extra process totally cures
the image so it is safe for laser printers and high speed copiers. Conventional
or Laser Raised Thermography offers a unique opportunity to accent, enhance and
highlight the graphic elements in any printed communication.
750 Imperial Court • Charlotte, NC 28273 • Phone: (704) 554-1188 • Toll Free: (800) 438-1851 • Fax: (704) 554-7000