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Step 2Preparing your photo emulsion
Follow the directions listed for your photo emulsion. For the Speedball photo emulsion I'm using here:
Fill Diazo Sensitizer bottle 3/4 full with cold water. Shake well. (The sensitizer was a black sludge on the bottom of the bottle, so mixing it thoroughly required lots of shaking and stirring with a chopstick.)
Pour the contents of the Diazo Sensitizer bottle into the Diazo Photo Emulsion container. Mix until all of the photo emulsion is a uniform color. The diazo photo emulsion starts out as a bright, light blue color. The sensitizer is a nasty black-green color. After mixing, the sensitized emulsion should be bluish-green.
Ideally, you want to do both this mixing step and the screen-coating step in a relatively dark room, to expose the emulsion to as little light as possible.
The sensitized emulsion can be stored (according to the bottle) in a cool, dark place for about 8 weeks at room temperature (70F), or four months in the refrigerator.
Fill Diazo Sensitizer bottle 3/4 full with cold water. Shake well. (The sensitizer was a black sludge on the bottom of the bottle, so mixing it thoroughly required lots of shaking and stirring with a chopstick.)
Pour the contents of the Diazo Sensitizer bottle into the Diazo Photo Emulsion container. Mix until all of the photo emulsion is a uniform color. The diazo photo emulsion starts out as a bright, light blue color. The sensitizer is a nasty black-green color. After mixing, the sensitized emulsion should be bluish-green.
Ideally, you want to do both this mixing step and the screen-coating step in a relatively dark room, to expose the emulsion to as little light as possible.
The sensitized emulsion can be stored (according to the bottle) in a cool, dark place for about 8 weeks at room temperature (70F), or four months in the refrigerator.
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Apr 4, 2010. 7:07 PMnappilyevrafter
says:
I guess you can make your own emulsion for cheaper, if you're super DIY. I haven't tried this yet. http://www.instructables.com/id/the_true_diyers_screen_printing/step3/WARNING-HARMFUL-CHEMICALS-aka-phto-emustion/
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