Photo quality printing is the ultra high resolution reproduction of digital artwork
onto printable materials such as paper, vinyl, film, polyester, etc.
The combination of graphic design utilizing high resolution images printed at ultra
high line screen values defines the photo quality printing process.
When designing for photo quality printing, graphic designers and printers start
with high resolution images of 2400 dpi or higher. Traditional full color non-photo
quality printing is done from images of 1200 dpi or less. Photo quality printing
requires images to contain the most amount of color information possible. The high
resolution images used in photo quality printing is saved in a CMYK file format
to best utilize either the commercial printing process or inkjet printing photo
quality output capabilities. CMYK dots of Cyan (blue), Magenta (red), Yellow, and
Black are placed next to each other in specific patterns that trick the eye into
seeing millions of colors. Photo quality inkjet printing transfers 4 or more toner
colors to the substrate in a single cycle through the printer. In photo quality
commercial printing each color of ink is applied separately.
The high resolution photos are printed (or output) at a line screen value of 1200
lines per inch. Traditional full color printing is done at a line screen ranging
from 300 to 600 lpi. The resulting photo quality output is apparent to the naked
eye and by using a micrometer. The output includes more dots of ink or toner within
each square inch output - and - truer color values and hues due to the greater amount
of color information stored in the high resolution image or artwork file.
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