119
Sign & Display Materials
BFP - PRINTING
BFP sheets are preferably printed by means of screenprinting.
To assure a good adhesion of the inks, Corona treatment of the sheets is obliged.
For screenprinting it is recommended to use solvent-based or UV inks.
Water-based inks are giving poorer results.
ADVISED SCREENS
The finer the mesh of the screen, the finer the print. The rougher the screen,
the thicker the print layer will be.
Printing with solvent-based inks, screens with 120 lines/inch are recommended.
For thicker prints, rougher screens should be used.
Printing with UV-based inks, screens with 150-180 lines/inch are recommended.
If rougher screens are used with UV inks, the ink would not dry fast enough.
DRYING OF SOLVENT-BASED INKS
The drying of the ink can be realised in dry-racks in a drying oven (furnace).
The drying time and temperature is dependant on the sheet thickness, the
thickness of the printed layer and the type of drying oven. Proper tests prior
to production are recommended.
DRYING OF UV-BASED INKS
UV-based inks are dried by UV-radiation. The drying happens in a split second.
The speed of exposure to this UV-radiation source is dependant on the
intensity of the UV-radiation, thickness of the printed layer, colour of print, etc.
Whilst using solvent-based inks, it is advised to keep in mind that the ink can
dry after a while into the screen when not operating. Printing with UV-inks
doesn't have this risk, since inks are drying only under UV-radiation.
There are a lot of ink-suppliers who offer inks suitable for printing on
polypropylene sheets. The best ink will be different for every printer, so
proper testing is advised.
WE CAN RECOMMEND THE FOLLOWING INKS
SOLVENT-BASED INK SUPPLIERS:
•
POLYPRO TPP
•
MASTERFLEX RA
•
UNIVERSAL SE
UV-BASED INK SUPPLIERS:
•
PLASTOLUV
•
UV EXCURE
The printing information
provided on this page is
based on current knowledge
and experience. The data
does not imply any warranty
from Blackburns Metals or
the manufacturer towards
third parties. Users should
consider this data as
a guideline and gather
additional information, to
make independent decisions
regarding the proper use,
disposal, safety towards other
parties and the protection of
the environment.
For further information
please contact your
nearest Blackburns
service centre or email...
info
@
blackburnsmetals.com
(see back cover for locations
and contact details...)
