These pics are of an older two colour job for 'So So Modern', designed by Autistk. The poster was printed as an edition of 50 A1's. Hopefully it helps y'all understand the process a little better!
All equipment was built from scratch by myself and the old man. Enjoy!
Here's the seperations. These are the designs, turned into their respective colours/layers, as each colour is printed one at a time. Black on the right, red on the left. Thanks to Microfilm for these!
The seps are then stuck to the screen. The key is UV sensitive emulsion (the orange stuff), which is coated onto the screen earlier and needs to be kept out of the light until exposure. I keep my large screens in the attic: smaller screens in a light-safe box I made.
The screen then goes into my UV lightbox for exposure...I use 6 UV bulbs at around 20mins, which burns the design from the seps into the emulsion. The foam on the right pushes the screen flush to the glass when the lid is closed, making a crisp image.
After exposure, the screens are washed down. The black areas in the design block the light, but the clear areas are burned into the screen. The result is that the blocked areas (the yellowish sections) washes away, making the stencil for printing!
Sweet, so my screen is dry and I'm taping it up so I can print. The orange areas are blocked, so no ink can pass through. It's the other (yellowish) areas where the inks passes through in the printing process.
I use clear packing tape on the gutters, which helps cleaning up the excess ink and stops leakage at the sides.
Screen is locked into my vacuum table using hinges, and the stock is ready to register. I use business cards as a 3 point rego system....I also use that kick arm which holds up the screen and helps for feeding in stock.
The screen is lowered, and I then add the ink. I use waterbased inks so I don't have to deal with chemicals.
Printing the first layer, red. Generally lighter colours go first. This is the repetitive part. So for a 50 poster job I'd do this action 50 times, plus another 50 for the second colour!
And ta da! I work from right to left, and usually get up a bit of pace, which is nice. Loud punk (Minor Threat usually) or national radio is a necessity for this process.
Here's the first colour done.
The screens then get cleaned in my washout area out back. Tape, ink, blood, etc.
Time for the second colour. I line up the second colour with the transparency, then do the same with the screen to make sure registration is ok. This is probably the hardest thing because things can move during the whole process!
Tape it up, line it up, and get ready to brake my back again. Music on.
Done!