Screen Exposure Instructions w/ 500 Watt Halogen Light With Glass ON The Halogen Light
For those of you exposing your screens with a provided or bought 500 watt halogen light please follow these instructions carefully as they differ from the instructional DVD.
Exposure Height: 16 Inches above the center of the screen
Exposure Time: 12 Minutes 30 Seconds – 13 Minutes 30 Seconds
Dry the screen in a dark room at about a 90 degree angle with a fan on it. It is recommended that you let the screen dry for at least 4 hours, although 12-24 hours is ideal. You can also lay the screen flat, as long as the actual mesh of the screen does not touch anything. A rack would be ideal, or if you have blocks to rest the frame on, that would work as well.
Place your positive film transparency reversed on your screen where you want it to print and cover it with your piece of glass. In case you are wondering, the piece of glass helps you to create positive contact. Positive contact is very important, as it helps you to get a very crisp, clean burned image. The idea is that the more closely your design is pressed to your screen, the less disruption there will be. This allows your design to burn cleanly, and without blurred edges.
Expose for 12 minutes 30 Seconds:
Wash with cold water from a hose sprayer, (small pressure washer is recommended).
Note: When your design starts washing out, you can switch to a spray bottle filled with cold water and wash the detail part of your design out with a cold hard spray from a spray bottle. This may save it.
Further Exposure Tips to Closely Follow:
First of all, be sure that you are doing all parts of the emulsion and exposure process in a light safe environment with a yellow bug light or light safe bulb and NO outside or bright light what so ever. This includes mixing your emulsion, coating your screens, drying your screens, exposure, and washout.
Be sure that you are not coating your emulsion too thick. When using a scoop coater, also be sure that you take the black plastic or rubber application protector off the coater before applying the emulsion on the screen.
Be sure that your film is very opaque and dark. If you hold it up to a light and can see through it, you probably need to double print your film and stack the film on top of each other to achieve a more opaque image.
Insure that there is a positive contact between your screen mesh and your positive film. If the film is not pressed completely against your mesh then you will get light reflection between your positive screen film and your screen which will result in a blurry and not clear image.
Also be sure that you are exposing your screen for the correct amount of time which the light or exposure system you are using. If you are unclear on exposure times please feel free to ask us.
*If you have to take your screen outside to washout and you have no other options. Be sure that you take it outside in a very black trash bag and do not expose to light during movement. Also be sure that you are washing your screens out in a dark shaded area or at night if possible. If any bright light gets onto your screen during the washout process you might have problems washing them out completely.