Emulsion Flakes Washing Out The Stencil
Posted: Sat Apr 25, 2015 11:47 am
I am brand-spankin new to screen printing. I've actually only attempted 2 thus far and both times the emulsion around the image has flaked off as I was rinsing the image out. The first one, I believe now, flaked because I had too much water pressure. The second one though, I'm still not sure because I took more time and less pressure rinsing it out and it still flaked on me. I did not think to use degreaser on either of the screens before applying emulsion. Is there a specific kind to use? also my dry time for the emulsion has been about 2 hours in a small dark room with a small space heater. It is completely dry to the touch so, being new, I assume it is dry and ready for exposure.
I have rigged up my own exposure unit using a non filtered halogen work lamp. In one of the instructional youtube videos I watched, a man using a similar exposure unit said to expose the image on the screen for about 30-45 minutes. The first screen I exposed for about 45min. When it flaked off I thought it may not have exposed long enough so the second screen I kept under the unit for a little over an hour. What is the right amount of exposure time? and After the image has been exposed on the screen, is there a time frame or wait time for rinsing the stencil out??
Any help/advice will be much appreciated!!!
I have rigged up my own exposure unit using a non filtered halogen work lamp. In one of the instructional youtube videos I watched, a man using a similar exposure unit said to expose the image on the screen for about 30-45 minutes. The first screen I exposed for about 45min. When it flaked off I thought it may not have exposed long enough so the second screen I kept under the unit for a little over an hour. What is the right amount of exposure time? and After the image has been exposed on the screen, is there a time frame or wait time for rinsing the stencil out??
Any help/advice will be much appreciated!!!