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OPERATION & MAINTENANCE
22
HOW DRYING IS
ACCELERATED
WITH TEMPEST
®
HOW TEMPEST
®
WORKS
Tempest
®
creates a two-step drying process when used with oil-base
inks. These steps are:
1. Skinning the surface of the ink with the initial blast of hot air to
prevent set off.
2. Accelerating the final drying process approximately 20
o
F over the
cold stack temperature in the feeder. Heat accelerates the drying
process, called oxidation and reduction, of oil-based inks.
In general, dryers including infrared do not work well with rubber or
acrylic-based inks. These inks should be avoided when maximum
results are desired.
1. When voltage is applied to the thermistors (triangular shaped
objects arranged in a honeycomb pattern), the thermistors begin to
heat. (Thermistors are coated semiconductors).
2. Thermistors heat to a predetermined temperature, in this case
about 400
o
F, and remain at that temperature. This is known as
autostabilization.
3. The fans blow air down towards and through the thermistors,
creating a flow of hot air to the sheet.
4. Drying of the ink occurs in the two-step process as described
above.
No dryer totally eliminates the need for spray powder. There may be
some jobs, for example, a heavy solid on a high gloss sheet where
powder is required. Overall, Tempest
®
should reduce your spray
powder usage significantly, leaving you with a better printed product
and cleaner working environment.
ON/OFF OPERATION
The switch is located on the side of the Tempest
®
box which
provides power to the box. Select 1 for on and 0 for off.
TEMPEST
®
OPERATION