wallPen E2 | User Manual
122
Miscellaneous
10 Miscellaneous
10.1 Suitable Substrates
Printing Indoor
General remarks
The substrate should not have excessive depressions. If the distance is
more than one centimeter, the UV rays cannot reach the ink particles
intensively enough, so that the print may not cure sufficiently. You
should therefore move the print head as close as possible to the wall
in order to achieve optimum curing. If in doubt, do not apply the print,
especially indoors.
Risks and indications
Odor and health risks due to the evaporation of not completely
hardened UV ink can result. If in doubt, test the substrate by printing a
test print on a sample. On a usable substrate, the UV ink should be
almost completely cured and firmly bonded immediately after printing.
After complete curing, the UV ink behaves like a polymerized plastic.
The substrate has a significant influence on the degree of curing to be achieved. A
possible pretreatment of the substrate can be found in chapter "Miscellaneous |
wallPen Glass Magic".
Other factors to achieve a good printing result are: Intensity of the LED unit, distance of
the print head from the wall and duration of UV irradiation (= speed of the head).
Before printing, check the degree of curing with a sample. If possible, print on the same
material under the same conditions before the final print and check the durability of the
ink on this substrate after a test print. If necessary, increase the intensity of the UV lamp
and/or use a primer.
Substrates
A big advantage of UV printing is the wide range of substrates that can be printed
without problems. The wallPen UV ink is also particularly suitable for indoor printing,
which, according to the manufacturer, contains hardly any chemical plasticizers and is
therefore unlikely to evaporate. As a matter of principle, we always advise you to check
every substrate thoroughly for its suitability before printing. Here are a few examples:
Is the printing area possibly partially soiled? Is it contaminated with adhesive residues?
Have different colors been used for coating?
In general, we have had very good experience with direct printing on wood, concrete,
stone, latex, plastic and wall paint.
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