So I wanted to share some issues I’ve been having that I am pretty sure is linked to my emulsion. A couple weeks back I was coating a screen and I noticed that my emulsion looked like it turned a darker pink, almost red. I checked the date and and it was almost 6 weeks since I first opened it and thought that it probably was starting to go bad. I decided to just use the rest of the emulsion to test out a couple different prints and order another quart.
After coating the screens with the remaining emulsion and burning the images on them, I noticed that it took a lot longer to wash out the image even with the power washer. Because it took a lot longer to wash the image out, there was more water was on the emulsion and I ended up blowing out about 4 of the 7 images.
Another reason the image being blown out could be that I did not expose the screen for the correct amount of time. To help me determine that I am correctly burning the screen, I purchased an exposure calculator. The exposure calculator is basically a small, narrow strip of film that is placed on the screen when burning it. It measures only 1/2″ x 3 3/4″ and it will fit on your production screen without interfering with other graphics. There are 10-step’s that tells you how to adjust your exposure time for complete stencil curing. If after using the new emulsion with the exposure calculator and I am still blowing out the image, I may have to make sure the image on the transparencies are dark enough.