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Offset printing is a commonly used printing technique
where the inked image is transferred (or "offset") from
a plate to a rubber blanket, then to the disc's surface.
At U-TECH Dallas we use waterless offset printing.
Waterless offset printing is a method of offset printing
which is less environmentally damaging than conventional
lithographic printing. For Offset printing, offset half
tone inks (cyan, magenta, yellow, black)are used to
print the product.
The upper surface of a finished disc is usually printed
with up to six colors by a flat silk screen process.
Each color requires a different screen created from
label films produced as color separations from the
artwork. Each color is printed using a squeegee which
pushes the ink through the mesh of the screen on to the
disc surface.
The inks are then cured using UV light to produce a
durable surface. For Screen Printng, PMS colors and half
tone inks can be used. Offset printing, offset half tone
inks (cyan, magenta, yellow, black)are used to print the
product.
For Offset and Screen print picture discs, five colors
are needed. These are white for the base, plus cyan,
magenta, yellow and black (CMYK). A sixth, spot color
can be used where required.
Printing options for DVD discs depend on the format as
shown in the table below:
| Printing
options |
DVD-5 |
DVD-9 |
DVD-10 |
| Normal
printing on upper surface of disc (like CDs)
|
Yes |
Yes |
No |
| Pit Art
where a holograph like image is moulded into the
blank substrate |
Yes |
No |
No |
| Printing on
both sides but only within hub area |
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