Support

If signs become smeared during final cleaning after sealing.

1. Screen printing

a) Too little color in the pores: therefore 1x flooding, then 2x printing. Or at least print SLOWLY so that the protective layer dissolves and the ink can penetrate the pores.
b) It was printed on the wrong page. It must be printed on the protective coated side (GEDA protective layer / liquid laminate). Lightly moisten the plate: If the stain remains, it is the NOT protectively coated side that should NOT be printed.
c) Use a maximum of 120 sieve, otherwise too much paint will get on the plate.
d) Streak formation (after sealing) when applying surface pressure: Squeegee is sharpened too sharply. Squeegee with sandpaper (break edges), use 70-75 Shore.
e) Cloud formation (according to Sealen) with surface pressure: Squeegee is ground too round. Sand edges.

2. Drying

d) Dry the paint in the air for at least 1 hour, then put it in the drying oven. Or air dry for at least 2 hours without using an accelerator.
3. Sealing/compacting/closing pores
e) Heat water to at least 95° C, only then insert the signs.
f) Water temperature too low, display may be inaccurate. Therefore turn the switch up to 100° C (water just before the boiling point).
g) Sealing time should not be less than 40-45 minutes.
h) Change water AND seal salt (mandatory!) after a maximum of 6 months! The salt helps to optimally close the pores and protects the colors from bleeding when compacted.
i) If all of the above points are met and the problem is still not solved, proceed as follows: Swirl the signs in the sealing bath for the first 2-3 minutes (up and down), then insert them into the nets and finish sealing. With this process, the excess paint comes off the surface more easily and there is no so-called paint film over it.

Problem solving with GEDA COPYING

1. Copy

Depending on the UV exposure device, 50-120 seconds.

2. Develop

With cold, running water. Typeface must be perfectly visible after 30-60 seconds. Possible problems and their causes:
a) Layer is completely removed. Cause: severe underexposure, i.e. increase the exposure time by at least 50%.
b) Photo layer spongy, writing is partially washed away. Reason: Slight underexposure. Tip: Increase UV exposure time by 20-30%.
c) Typeface not visible at all or only with difficulty. Fine lines and grid dots are gone. Overexposure. Tip: Reduce exposure time by 20-30%. If necessary, carry out step exposure.
d) Photo plate too old = over 12 months. Date see package and back of plate 200241 = production 2002 in April.
e) In addition to d) the main reason, the photo plate received too much daylight when cropping and can no longer be exposed. The photo layer is already bluish and no longer greenish.

3. Drying

Be sure to drain with newspaper and only then dry completely with warm air or on a hot plate.
a) Newspaper sticks to photo plate. Cause: left on wet photographic plate for too long and/or exposure time too long, resulting in insufficient hardening of the layer.

4. Coloring

Apply photo paint in a circular motion with a well-soaked cloth for approx. 30 seconds. After 30 seconds of exposure time, wipe off the photo paint completely.
a) Color has bleed through. Causes:
1. Color applied with significantly too much pressure, or
2. Colored for too long. Several minutes, or
3rd plate was not still wet/damp when staining, or
4th color was on plate too long before wiping off.
5. Paint not completely wiped off before stripping.
6. Humidity too high at +60% (warm, humid weather!)
b) Typeface incompletely covered in color. Causes:
1. Too little color was applied, or
2. Protective visibility during coloring was not dissolved properly due to coloring being done for too short a time or not rubbing the color in in a circle
3. Pores suck poorly because the developed plate was not drained with newspaper before drying (pores with Residues clogged)
4. Pores do not absorb sufficiently due to a material defect
5. If the writing is negative (colored background, silver writing), the film/laser foil is not dense enough. Tip: Warm the plate a little, then color it again with enough color.

5. Stripping/decoating

Decoat the photo plate with a stripper, use a sponge or cloth.
Small color dots/corns are visible after stripping. Cause:
1. Water and photo ink have mixed, for example through saliva that gets onto the plate when speaking, coloring or sneezing.

6. Sealing/compacting

Preheated to 95°C for 40 minutes! Seal bath.
Loss of color or bleeding of colors, especially after final cleaning. Causes:
1. Plates not submerged until the water temperature has reached at least 95°C.
2. Average temperature during sealing was below 95°C.
3. Sealing time is too short, i.e. less than 40 minutes
4. Lack of sealing salt in the water
5. Water with salt over 6 months old.
Tip: Please note the separate operating instructions for sealing/compacting.