Specifications

50
Manual
ProtoMat 95s/II
6.10 Milling layout films
LPKF RF Cutter
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Layout films may be machined with LPKF RF Cutters.
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Secure the film base (plexiglas or glass sheet) onto the machine bench with Tesa tape.
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Lay the film material on the base with the coated (matte) side facing upwards.
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Now flatten the film material out firmly on the film support, expelling any air completely.
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Now stick down the film on all four sides with a non-stretching transparent adhesive tape
to form an air seal.
There must not be any air bubbles between the film and the base.
The milling depth can now be set at the film edge.
It can be checked by milling a frame around the film area (manual method).
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The speed of movement should be reduced to about 15 mm/sec.
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Switch on the extractor, but only to half power, so that it extracts "secondary air" on the
suction connection or reduce the power on the electronic vacuum system controller if
there is one fitted.
The film milling program may now be started.
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Film material comes in DIN A3 and A4 formats (special sizes available upon request).
Important:
The film coating is easily scratched and is water-soluble,
so do not let it come into contact with water.
The film can be recopied with a colouring device upon request.
See the section entitled "Practical tips" for more information.
6.10.1 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.