Milling and drilling
36
ProtoMat M60
7.9.1 Correction agents
Gravure films can be corrected with Duroscal correction liquid red, which
is easy to use. Paint in the problem areas with it, leave to dry for about 5
minutes and then further process the gravure film in the normal way.
The corrected areas can only have their coating removed with a quick
acting coating remover.
Caution! Follow the safety instructions on the correction agent
container!
7.9.2 Coloring milled films
For milled negative films, there is Duroscal color black, with which
positives can be made. The fully milled gravure film is colored with
Duroscal color by pouring the liquid onto a SAFIR pad and spreading it
evenly over the whole film. Excess color must be wiped off with cellulose
wadding. The stained film must be held against the light to check it and
to find poorly covered areas so that they can be re-colored. Then
immediately remove the coating. The color must not dry.
Caution! Follow the instructions on the color container! Important:
the liquid must not get onto the back of the film as it cannot then be
removed from it. The color is also difficult to remove from other
surfaces (fabrics, skin) (wear apron and rubber gloves)!
7.9.3 Coating removal
Caution! Follow the safety instructions on the quick-acting coating
remover container!
When removing coatings, only treat one film per container to prevent any
damage of the second film by contact between the back of it and a
surface wet with color.
There are two options when it comes to coating removal:
Quick coating removal
Pour the quick-acting coating remover onto the film and immediately
wipe the dissolved protective coating with cellulose applying slight
pressure. Then dry the film with cellulose wadding, blotting paper or a
cloth.
Removal with water
For this method, the film must be placed in a bowl of hand-hot water (to
which a small amount of washing-up liquid has been added). The
protective layer dissolves after about 30 minutes. Any coating remains
must be removed with a fine hand brush. This method is cheaper and
more environmentally friendly. The film can be left in the water bath as
long as you want.
