A while back, I read about a technique for registering multiple colors that went something like this:
- Using rulers and registration marks, make a sincere attempt to have your films line up in the same place relative to the frames of the screen(s) before you expose them.
- Print the first color, making sure you've pre-racked your paper ahead of time.
- Clamp in your second screen and tape down the far side of something transparent (like a blank piece of film) over your print surface, turn on the vacuum, and print your second color onto that clear sheet.
- Lift up your screen, slide your first piece of your one-color-so-far print run paper under that transparent sheet and line up your registration marks.
- Lay in masking tape tabs on the corner(s) of that piece of paper.
- Remove the transparent sheet.
- Print the rest of your run.
I'm sure it was a post on these forums that described this method, but I can't for the life of me find it again. The appeal of this (proposed) technique is that you don't have to try to move or reposition your screens once they're clamped in, and since my setup is a pair of Jiffys bolted right into the press*, this sounds like the sort of color registration system I'm looking for.
Could anyone clarify if I've got the right idea here or if I've missed a step or some key concept of this? Should I try to use a large sheet of tracing paper instead of a blank sheet of film? Something else entirely?
Thank you in advance for any/all advice.
*I know that having your clamps on a separate shim is the best thing for projects where your off-contact needs to change, but I'm just trying to focus on prints on paper for now.