Cels Forum

Here's what I do; it's rather similar to the 
original process:
I do a rough draft(genga) of what I'd like to do, with
shading and highlighs all drawn in. Next, take a clean 
sheet of paper and trace it.  I only trace the lines that
I'd want to have be black lines on the cel.

I don't have any of the special ink studios use when they
do the hanken cels, so I scan the tracing as line art,
clean it up a little in Photoshop(get rid of the edges,
any blemishes or do any alterations I want) then I print
the image onto a transparency with a laser printer.

Then I just paint stuff on. Some people use xerox machines.

I have a bunch of acrylic paints from a painting class.
There's a product called "flo-ease" from Golden that allows
for you to make the paints less viscous without breaking 
the binder(what holds the paint together.)

I did a cel using this method for my friend's birthday.
She loved it, the colors are bright, the lines are crisp,
and the whole piece is rather durable.