Nipson Varypress 200, Paper Manual

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4-
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Paper guide
VARYPRESS 200
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4. Special substrate types
The flash fusing system used allows printing on a wide variety of printing substrates, particularly
plastics or other fragile materials which would be deformed by the heating effect of a radiant oven or
of hot rollers.
The following will describe configurations and material types suitable for printing.
NOTA : It is strongly recommended to test samples of any special substrate type before buying
stock in quantity.
4.1 GENERAL REQUIREMENTS
Temperature
The printing substrate must withstand a temperature of 55ºC throughout the substrate material,
as well as a peak temperature of 120ºC at the interfaces between toner and substrate.
Quality of contact with image drum
In the transfer zone, contact must be maintained at all times between the image drum and the
surface being printed. To achieve this, the substrate surface must either be flat or easily
flattened, and must not be able to move freely relative to its support medium.
4.2 PREPRINTED SUBSTRATE
The machine will print on a wide variety of preprinted substrate material. Attention should be given
to the following characteristics.
Curing / drying
Curing of preprinted forms must be completed before delivery.
Intensive heating / drying which result in paper moisture content below levels specified in
section 2.3 “Paper Specifications”.
Stability of preprinting toners
For preprinted substrate at a temperature of < 50ºC, the preprinting toners used must not:
- Transfer to paper or metal through rubbing contact under normal printing conditions
- emit vapors or odors.
For preprinted substrate brought to a temperature of 120ºC for 10 s, the preprinting toners
used must not emit vapors or odors.