Place the laminated copper plate on the
vacuum frame.
Place the line drawing on top.
Turn on the vacuum and expose the plate
in the UV light for 2-3 minutes.
Take out the plate and remove the top
foil by rubbing your hand across the edge
of the plate. Place the exposed plate in
the developer (10 grammes of soda
crystals diluted in 1 litre of water).
Use a sponge in the developer as though
you were washing the plate.
After a couple of minutes with steady
movement the image will appear clearly.
Take the plate out of the developer, rinse
it in running water and check the depth
with the back of your hand. If it does not
feel deep enough, develop it further. The
image must appear clearly coppery in the
blue photopolymer film.
Rinse the plate, dab it in a newspaper
and let it dry in the drying cabinet.
Finally harden the plate in UV light for
minimum 3 minutes.