Screen printing experience

Due to the reasons such as the denseness of the screen, the brand of the photosensitive adhesive, and the light source, the exposure time will be inconsistent. This requires time to accumulate experience.

Here, we recommend a test method:

1. Prepare a stencil with good sensitized adhesive, and prepare a negative (there is preferably a large pattern and a thin line above), and glue the left end of the negative and the stencil with transparent tape (avoiding the negative and the screen) The position of the mobile);

2. Use a piece of red paper (red or black waxed paper, or red film - thin and light-blocking) between the film and the screen, covering the right three-fourths of the pattern, left One-fourth is exposed and after five minutes of exposure with normal methods, turn off the power;

3, move the red paper to the right by a quarter, that is, half of the film is covered, half exposed, after the normal method of exposure for five minutes, turn off the power; and so on, exposure four times, the screen The four sections from left to right were exposed for 20 minutes, 15 minutes, 10 minutes, and 5 minutes respectively.

4. Use the usual method to clean the screen, carefully observe which part of the effect is good, which time is used.

note:

1, you can also choose to move red paper from right to left;

2, you can also choose to exposure for 1 second, 180 seconds, 300 seconds.