HP 250 - Transparency Film; Limitation of some Early HP 7225 A Models

Graphics Devices
Transparency Film
The transparency film surface must be completely free of
fingerprints and dust for the ink to adhere properly. Always
handle with the tissue covering the writing surface.
Leave the tissue on the film while placing it on the plotter.
Engage the electrostatic chart hold by turning off the CHART LOAD
lamp. Then smooth down the film with the back of your hand
rubbing across the tissue. Finally, carefully remove the tissue.
The ink dries on the transparency film in about. 10 minutes at
20-30 degrees C (68-86 degress F). It will dry faster at
temperatures up to 55 degrees C (131 degrees F), slower at lower
temperatures to 10 degrees C (50 degrees F). Until dry, nothing
should be placed on the transparency material. You may carefully
remove it from the plotter while still wet, holding it by the
edges and placing it in a safe place.
Always store the dry transparencies in a cool, dry place with
tissue between sheets of film or enclosed in a plastic cover.
Limitation of Some Early HP 7225A Models
An application program can instruct the plotter to slow down the
maximum plotting speed for transparency film applications. This
allows better ink transfer from the pen to the transparency film.
Some early models of the HP 7225A Graphics Plotter do not have
programmable pen velocity control. For those models, the pen
will travel faster than desired for long lines, and you must be
especially careful to use clean transparency film and fresh pens
as often as possible.
7-10
Graphics Devices
Transparency Film
The transparency film surface must be completely free of
fingerprints and dust for the ink to adhere properly. Always
handle with the tissue covering the writing surface.
Leave the tissue on the film while placing it on the plotter.
Engage the electrostatic chart hold by turning off the CHART LOAD
lamp. Then smooth down the film with the back of your hand
rubbing across the tissue. Finally, carefully remove the tissue.
The ink dries on the transparency film in about. 10 minutes at
20-30 degrees C (68-86 degress F). It will dry faster at
temperatures up to 55 degrees C (131 degrees F), slower at lower
temperatures to 10 degrees C (50 degrees F). Until dry, nothing
should be placed on the transparency material. You may carefully
remove it from the plotter while still wet, holding it by the
edges and placing it in a safe place.
Always store the dry transparencies in a cool, dry place with
tissue between sheets of film or enclosed in a plastic cover.
Limitation of Some Early HP 7225A Models
An application program can instruct the plotter to slow down the
maximum plotting speed for transparency film applications. This
allows better ink transfer from the pen to the transparency film.
Some early models of the HP 7225A Graphics Plotter do not have
programmable pen velocity control. For those models, the pen
will travel faster than desired for long lines, and you must be
especially careful to use clean transparency film and fresh pens
as often as possible.
7-10