AN IMPROVED PROCESS OF MANUFACTURING TRANSPARENCIES
Year: 1884

page_text: I ERNST OTTO GRÜNERT of the City of Meissen in the kingdom of Saxony,
German Empire, architect, do hereby declare the nature of said Invention for
AN IMPROVED PROCESS OF MANUFACTURING TRANSPARENCIES, to be as follows:-
The Invention relates to an improved process of manufacturing "Linophanies" or
transparent pictures, ornaments and other articles consisting in the use of paper-
pulp as hereinafter described.
Into a suitably prepared mould is poured fluid paper-pulp, which is covered with
a separating, material and then with a blotting material.
The whole is now pressed so as to remove the water from the pulp, and after
having taken it out of the press and removed the blotting and separating materials
it is kiln-dried. The dry paper-leaf is then taken out of the mould trimmed and
finished.
It forms now what I call: "Linophany," a transparent paper-leaf, which when
placed against the broad day-light or an artificial light, shows. the lights and
shadows of a picture, ornament or other article corresponding to the engraving of
the mould.
ERNST OTTO GRÜNERT.
By Harris & Mills,
23, Southampton Buildings,
Agents.

page_text: I ERNST OTTO GRÜNERT of the City of Meissen in the Kingdom of Saxony,
German Empire, Architect do hereby declare the nature of the said invention for
AN IMPROVED PROCESS OF MANUFACTURING TRANSPARENCIES and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:—
The invention relates to an improved process of manufacturing linophanies or
transparent pictures ornaments and other articles consisting in the use of paper
pulp as hereinafter described.
In the production of transparencies out of paper pulp in which the light
penetrating the different thicknesses of pulp produces the pictures in their shadings
there are in particular two points to bo observed in order to obtain really good
articles.
First of all the pulp must be filled into all the hollows and deeper parts and then
the pulp must be pressed together, the different thicknesses of the material being
left as they are, and all superfluous water must be removed to such.an extent, that
the picture can dry in its mould on a heating plate without losing its transparency.
The method of proceeding is as follows: The paper pulp, for which a mixture
of silk-paper stuff and bleached straw stuff is best adapted, is supplied to the mould
in a suitable quantity and with the aid of a brush it must be carefully directed into
the unevennesses in the surface of the mould and all the deep places must be filled
up with it. The mould for the reception of the paper pulp is a galvano-plastic
precipitate on a negative reproduction of the picture in plaster of Paris.
The paper pulp having been applied to the copper form in the manner just
described and smoothed over with a brush, the wet pulpy surface is covered with
gauze and thick felt cloth and then put in a press and submitted to pressure. By
this means the felt is pressed into the deep places and the water contained in the
pulp under the felt is sucked up. by it.
The gauze lying in between prevents the escape of any parts of the paper stuff
and preserves the thickness of the layers.
After removal of the water in the way just described the whole form is subjected
to a henting process until the sheet of paper becomes quite, dry and loosens itself
from the form. It is then only necessary to dress it to make the picture complete.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
The improved process of manufacturing linophanies or transparences from paper
pulp substantially as herein described.