Hi forum. I am currently using RPX Dual core emulsion on a 156 mesh screen. After 24 hrs of drying I place the transparency film on the back of the screen with a foam pad under the screen creating a positive contact with the image and the glass sheet on the top layer. I have a 500 watt work light (glass removed from light) that sits 12 in above the glass. The exposure is on for 20 minutes. When I was it out I notice that the emulsion has a slight slime feeling to it. I would think after 20 minutes I would at least be over exposed.
Just wondering if I’m missing something.
Slime means it is under exposed (assuming that it was properly dry to start).
Check your bulb. Newer work lights tend to come with a bulb that only emits light at 2700 -2800k ( kelvin). These give off very little UV light. Search online for a bulb that emits light at 3200k, which is about as high as halogen bulbs go ( you might get lucky and find one at 3300 or 3400k). There will be much more UV light, meaning a better or faster exposure.
For the cost why not consider upgrading to a 1000w worklight?