KC Printing Machine (Group) Limited
In order to improve the clarity of the pattern and the photosensitive paste the uniform distribution of the screen surface, the drying process should ensure that no dust pollution around, and should be operating in the darkroom or yellow light. Place the screen frame, printed side up, keep the screen level. Dust free fan drying, but in order to speed up the drying speed drying box (Note: the maximum temperature must not exceed 40 ° C).
Scratch coating layer is fully dry, wet surface will affect the light sensitivity of the photosensitive paste must be done before the exposure. Not completely dry, there will be underexposed
Drying operation guide:
1) The third scratch coating method, each coated once must achieve sufficient drying of a coating, otherwise, make moisture caught in the middle of the photosensitive layer.
2) If possible, should be kept to a constant indoor temperature. If the indoor humidity to extend the exposure time, especially in the summer, if not lower humidity device, should pay special attention to this point. In fact, the cost of installing lower humidity device is not too high
3) often used in the industrial drying machine (maximum temperature 40 ° C), especially in the more humid environment. Must know, however, that the expansion due to heating causes the screen frame chromatic inconvenience that is difficult to achieve chromatic accurate. Therefore, in order to ensure that the chromatic accurate, all wire mesh and network box must be dried in the same environment. And they should be allowed to return to room temperature before making an exposure.
4) of the operating environment, should the exposure, dry place with the screen frame making cleaning separately, because more humid in the production of wire mesh and cleaning area
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