Chapter 2: Theory Of Operation; Dye Diffusion Thermal Transfer (D2T2) - HiTi Digital Photo Printer 640PS Service Manual

Operating System
Minimum S ystem
Requirement
Certification
Accessories Included

Chapter 2: Theory of Operation

Dye Diffusion Thermal Transfer (D2T2)

Dye Diffusion Thermal Transfer (D2T2), the world's leading techno lo gy in p hoto
printing p rocesses, uses a thermal p rinting head (TPH) to sequentially heat three ribbon
panels that are coated with y ellow, magenta and cy an dy e. The heat p rocess turns the dy e
into gas that diffuses into a thin receivin g lay er on top of the p ap er. An overcoat is then
lay ered down on top of the p aper to p rotect the color against water and ultraviolet ray s
and to prevent i t from fading.
Comp ared with some other p hoto-capable p rinting technolo gies, such as Thermal
Autochrome (Fujifilm), Variable Dot (Fujicopian) and Inkjet (Canon, Ep son and HP),
Dye Diffusion Thermal Transfer creates the most realistic photo quality. To the naked
ey e it is indistinguishable fro m p hotograp hic p rints. Its continuous-tone p rinting p roduces
256 color gradation levels in each p ixel independently while other technologies, like
V ariab le Dot and Inkjet, have to make d ifferent dot sizes to increase the resolution in
half-tone to achieve similar effects.
The Thermal Print Head (TPH)
sequentially heats three ribbon p anels
that are coated with dye in y ellow,
magenta and cyan. The heat p rocess
turns the dy e into gas that diffuses into
a thin receiv in g lay er on top of the
pap er. An overcoat is then lay ered
down on top of the p aper to p rotect the
color against water and ultraviolet and
to p revent it from fading.
Confidential
Windows 98/ M E/ 2000/ XP
Linux & Mac OS 10.2 and abov e
Win 98/M E: 64M B RAM , Pentium PC
Win 2000/ XP: 128M B RAM, Pentium PC
UL, TUV-GS, FCC, CE, BSM I, CCC, C-Tick, VCCI
Pap er Cassette, USB cable, CD-ROM (with p rinter
drivers, bundle software and electronic manual), AC
p ower cord, Samp le p rint kit (8 sheets of p hoto pap er,
1 sheet of 4×4 sticker, 1 sheet of 4/2/4 sticker p lus 1
YMCO ribbon cartridge for 10 p rints
TPH
He at
Ribbon
Dye
Paper
5