kaart, als ideaal te beschouwen met name voor het
maken van proefdrukken en voor het maken van zeer
kleine oplagen (reeds vanaf 2 3 stuks) in meerdere
kleuren.
Met de beschikbare technische mogelijkheden kan de
kaarten-zeefdruk bestaande lacunes in de kaarten-
produktie opvullen en daarmede aan een vraag vol-
doen waaraan tot nu toe, bijv. op grond van financiele
mogelijkheden, niet tegemoet kon worden gekomen.
No o t
Dit artikel werd vertaald door drs. A.H. Sijmons en
H. Weinreich (voor de technische termen).
Su m m a r y
Map Reproduction by Silk Screen Printing, by Walter
Leibbrand
Silk Screen Technique
It might be assumed that with the common printing
processes - letterpress, lithography and gravure -
every reproduction problem can be solved. This
does, however, not seem to be so, because technicians,
industrial designers and advertizing people have some-
how increased their requirements during the last
twenty years.
It may be that the rediscovered Silk screen technique,
due to its manifold applications, has created this
avalanche of needs by itselfThe development of the
"forth printing process" in the last two decades is a
proof for the legitimacy of Silk screen printing in
many fields.
By this Statement we exclude that Silk screen prin
ting is a competitor for other classical printing
techniques. This has never been the idea. It was
merely intended by this reproduction process to close
gaps, which were so far not within the reach of the
Printers. The Silk screen technique has opened the
doors for new scopes and applications.
Principles of Silk Screen Printing
Silk screen printing is a "through-printing process".
A wooden or metal frame is covered by a fine and
resistant fabric. This "screen" is partly closed by a
templet glued down, copied down or otherwise trans-
fered, namely in all places, where the ink is not
allowed to penetrate. The open parts which are
pervious for inks are forming the image to be printed.
The material to be printed - paper, film - is placed
under this printing screen, which may be mounted
with a hinge to a plane table for clapping up and down.
With the help of the squeegee the pasty-like printing
ink is squeeged from above through the screen. The
templet is pressed down on the material to be printed
and the ink crosses the open parts of the image and
adhered to the paper, what finishes the through-
printing process.
Silk screen printing has been technically developed
within the last ten years, so that its use for map
printing has become possible, if its specific proper-
ties are taken into account.
Map images can be brought onto the screen photo-
mechanically with various specific coatings, depending
on the individual map image structure. Printing form,
printing accessories and printing machine are of
special importance.
Contrary to the ordinary printing processes, in a
"printing-through" process with a transparent
printing basement, one has be possibility to print
with sight and can reach therefore an optimal overall
register in each printing process. This possibility
is of special importance in map silk screen printing
because of the small number of runs produced
normally by this method.
12
1979. V. 1
