Photo-emulsion Screen Printing

Step 1Gather your materials!

Gather your materials!
What you need:
@ a screen
While I used a ready-made Speedball frame for this project, making your own screens is cheaper, and not hard to do. Take a look here and here for great tips on making screens.
@ a printing squeegee or piece of cardboard with a smooth, straight edge

@ photo emulsion and sensitizer
I used Speedball diazo photo emulsion and diazo sensitizer; the exposure times I list later in this Instructable are for this formula. If you use another type of photo emulsion, be sure to read the directions and test to make sure you have the correct exposure times.
@ screen filler fluid (again, I'm using the standard Speedball stuff)
@ photo emulsion remover (for taking the emulsion off the screen so it can be reused)
@ screen printing ink for fabric

@ a light table
-or-
@ light bulb (at least 150W, clear incandescent), light bulb socket with reflector, clamp, and cord

Miscellaneous useful things:
@ pushpins (at least 4 per screen)
@ chopsticks, popsicle sticks, plastic spoons -- for mixing and putting emulsion & ink on the screen
@ small paint-safe cups
@ masking tape (water-resistant tape is best)
@ regular transparent tape
@ lots of newspapers (to keep everything else clean!)
@ a book or piece of thick cardboard that's slightly smaller than your screen
@ sheet of cardboard that fits inside your t-shirts (if you're printing shirts)
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5 comments
Mar 11, 2010. 9:22 AMmiserymachine says:
Just as an FYI i found this out when i was in a pinch- photo emulsion remover is really pricey for the ammount you get, and I didn't have any but needed to clear a screen. So, not knowing what the active ingredient was I started through a multitude of cleaners; none worked! Emulsion is really hardy stuff. But, to my amazement, automotive brake and carb cleaner works PERFECTLY! A 20oz. can is like $4 and goes a long way. And as for tough spots? It's pressurized and will blast even the toughest buildup away!
May 11, 2010. 10:32 PMcynreams says:
N I C E!!!!
May 15, 2010. 9:29 PMcynreams says:

Shoot, I actually tried this yesterday and it didn't work for me.  What kind did you use specifically?  Thanks!

Feb 10, 2010. 11:17 PMjayhaycs says:
i would like to ask the ratio of the emulsion and sensitizers mixture..please help me
Mar 7, 2010. 1:21 PMjohnny3h says:
That depends on the BRAND of photo emulsion you are using.

The info you want is usually printed in a instruction sheet [or pamphlet that comes with the material].

Pro

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