How old is old? If your emulsion is older than 6 months, that is probably the issue.
Have you ever exposed a good screen with the settings you use? If yes, then I would buy new emulsion.
If no, then what settings did you lat burn a good screen with?
Have you ever exposed a good screen with the settings you use? If yes, then I would buy new emulsion.
If no, then what settings did you lat burn a good screen with?