Specifications

Stages in milling and drilling
ProtoMat 95s/II 57
7.10.1 Staining milled films
For milled negative films, there is Duroscal (black stain), with which
positives can be made.
The fully milled engraving film is stained with Duroscal stain by pouring
the liquid onto a SAFIR pad and spreading it evenly over the whole film.
Excess stain 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-stained.
Now remove the coating immediately. The stain must not dry.
Caution! Follow the instructions on the stain container.
The stain must not get onto the back of the film as it cannot be
removed.
The stain is also very difficult to remove from other surfaces
(fabrics, skin). Wear an overall and rubber gloves.
7.10.2 Removing the coating
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 colour.
Caution! Follow the safety instructions on the quick-acting coating
remover container.
There are two options for coating removal:
Quick coating removal.
Pour the quick-acting coating remover onto the film and immediately
wipe the dissolved protective coating with cellulose applying light
pressure.
Now dry the film with cellulose wadding, blotting paper or a cloth.
Removal with water.
This method involves placing the film 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 remaining coating must be removed with a fine hand brush.
This method is more economical and kinder to the environment than the
quick-acting method of removal.
The film can be left in the water bath as long as you want.