Click here to add or update a review for this product. Was this review helpful? It seems to me that the emulsion when activated was much more sensitive to light than it was the last time I did this. Having used this before as part of a kit I suspect that I used too much sensitizer although I used the amount suggested when I bought the emulsion.
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You can use Speedball Speedclean, Screen Cleaner or even washing up liquid. Wash and rinse your screen well and then leave to dry. To coat your screen you will need photo emulsion, scoop coater, cold water and a spoon. The handle of the spoon is useful to ensure that you have reached all the sensitiser from the corners. Once you have dissolved all of the sensitiser pour the contents into the Photo Emulsion and stir well. Press the edge of the scoop coater firmly against your screen and tilt until the flat edge of the scoop coater is touching the screen.
Drag the scoop coater smoothly up the screen to ensure an even coating, when you reach the top, tilt the scoop coater back so the emulsion falls back into the scoop coater. Repeat on the inside. If the emulsion is uneven use the scoop coater tilted back to remove any excess. The air needs to circulate around the screen so rest the edges of the frame on blocks or coins. When it is completely dry it is ready to expose. Place a piece of black foam or a book covered with a sheet of black paper under your screen.
Position the film positive so the image is backwards if your light is coming from above and then sandwich this together with a sheet of glass. Turn on your lamp and expose.
We expose for 15 minutes with our W lamp, if your lamp is a higher wattage the exposure time will be shorter. The unexposed emulsion looks a little more yellow. Wet both sides of your screen and then use a powerful jet of water a shower hose, garden hose or pressure washer is good to spray off the unexposed emulsion and reveal your image.
Leave your screen to dry before you print. Author handprinted Posted on.
How to use Diazo Photo Emulsion
Download Step 5: Expose Your Screen, Then Rinse Your screen is tucked away somewhere cool and dark to dry, so the next step is setting up your exposure rig. A lightbox or light table, with several fluorescent bulbs set directly under a translucent piece of acrylic, allows for simpler set-up and shorter exposure times, but may take some experimentation to figure out what the correct exposure time should be. Depending on what light intensity you have coming out of the lightbox, your exposure time could be around 4 or 5 minutes. The setup I used for this project is just a W clear incandescent bulb in a socket with a long cord and reflector. Setup: Before taking your completely-dry screen out, get the rest of your exposure rig put together. Lay the black fabric on the ground where your screen will be placed. This is especially important for text!