DEEN EnglishFRES  Login


Gedakop aluminium sign system / anodised printing

Fast, low cost reproductive technique for the manufacture of multi-coloured anodised aluminium printing panels. One-offs and small run production up to six copies. The following printing artwork is suitable: offset film or repro film, print onto GEDA Laser Star polyester film (mirror image) using 600 dpi laser printer, reblackened with GEDA-Black.

GEDAKOP anodised printing for sign makers making industrial signs and advertising signs

1. UV Exposure
Copy your printing artwork onto the protective-coated GEDAKOP-aluminium photo panel by use of the GEDA-exposure unit. GEDAKOP anodised aluminium photo panels are light sensitive and should not be exposed to direct or indirect UV light (e.g. sun light through window). However, they may be processed in normal indoor light conditions. Use mirror image litho film so that film is in direct contact with photo sensitive coating. Any customary UV exposure unit may be used, preferably with vacuum pressing. To evaluate the appropriate exposure time we recommend step exposure. Exposure time example: UV units approx. 1 minute (+/- 10-20%) exposure time.
2. Developing
Develop the exposed plate with running water until the graphics can be seen (blank aluminium). Spraying or etching machines are suitable for automatic developing of GEDAKOP-aluminium photo panels. In wet condition GEDAKOP aluminium photo panels are very sensitive and must not be hand processed.
3. Drying
After developing with running water, let the water drain off. Then blot with creasefree, absorbent paper (newspaper). Use warm air to dry off completely. Check before dyeing: Thanks to the dyed photo sensitive coating, it is easy to spot any imperfections (such as dust, film edge marking etc.). These must be corrected with GEDAKOP-Spot remover. Spot remover must be completely dry before applying any dye.
4. Dyeing
Exposed areas can now be dyed with GEDACOLOR-Photo dye. Use a soft cloth or a fine paint brush. Apply plenty of dye so that it penetrates the protective coating into the pores. Gently work the dye in with even, circular movements. Dye applied on larger areas should be "moved" again after a brief penetration time in order ro achieve even dyeing. Now remove surplus dye and dry the panel with a clean, dry cloth.
5. Stripping
Strip the panel with GEDA-Stripper. Brief immersion and gentle rubbing with a sponge dissolves the photo emulsion. Rinse panel with cold water.
6. Sealing
Close open pores by immersing the panel in boiling water (min. 95-98░C during 40 minutes) using a GEDA-Sealing tank. This process protects the dye by enclosing it inside the now closed pores. The GEDAKOP-aluminium photo panel is now scratch- and solvent-proof. Finally clean the panel with the environment friendly GEDA-Clean or nitro.

GEDACOLOR AG, Feldmattstrasse 34, CH-6032 Emmen/Waldibrücke, Switzerland
Telefon +41 (0)41 268 83 31, Fax +41 (0)41 268 83 32, Mail