Water-wash thick-layer plate for screen printing
Toyobo, the pioneer of Printight®, a water–wash letterpress plate, has commercialized an instant thick–layer photo–polymer film Cosmomask® used for screen printing.
This thick–layer photo–polymer film makes the preparation of screen film much easier compared with the conventional process.
Grade | Photo-sensitive layer thickness (µm) ±15μm以内 |
Available size |
---|---|---|
TF10E | 100 | A-2 (420mm×594mm) |
TF15E | 150 | |
TF20E | 200 | |
TF25E | 250 | |
TF30E | 300 | |
TF35E | 350 | |
TF40E | 400 |
Put the film onto the screen fabric. Then apply the photo-sensitive emulsion to the squeeze side of fabric. Then PS plate for screen printing is ready. Possible to decrease processing time drastically, compared with direct screen.
Peel off the base film and place the photo-polymer on the flat board made of foam polystyrene,...etc.
Place the frame with screen fabrics on the photo-polymer plate and spray water upon it thoroughly with a kind of sprayer.
After spraying 20-30 seconds, wipe off the excess liquid carefully with a squeeze several times.
Dry the assembly in the dryer at 40℃ for 15-30 minutes.
Seal the part around the edge of the photo-polymer plate with filling agent.
Dry the assembly in the dryer at 40℃ for 15-30 minutes.
Apply an emulsion to the squeeze side of the assembly.
Dry the assembly in the dryer at 40℃ for 15-30 minutes.
4 or 5 times of repeating step 7 and 8 is recommended.
Then peel off the cover film.
4 or 5 times of repeating step 7 and 8 is recommended.
Contact a positive film onto the photo-sensitive plate and apply UV exposure or metal halide lamp.
Washout unexposed polymer with tap water using soft brush or sponge.
And washout the emulsion remaking in the unexposed part.
Then washout in the fine parts with water shower.
At this moment be careful not to make water spray so hard. And be sure to wash it in a short time.
Dry the assembly in the dryer at 40℃ for 15-30 minutes.
At last, expose the photo-sensitive plate with the same time as the main exposure time.
Now, the assembly is ready for print.
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