A New or Improved Primuline Printing Process.
Year: 1890

page_text: Date of Application, 4th Nov., 1890
Complete Specification Left, 3rd Sept., 1891-Accepted, 4tn Nov., 1891
PROVISIONAL SPECIFICATION.
A New or Improved Primuline Printing Process.
We EDWARD WILLIAM FOXLEE 22 Goldsmith Road Acton London W.
Photographic Expert, and THOMAS BOLAS, 8 Grove Terrace, Chiswick Analytical
Chemist both in the County of Middlesex do hereby declare the nature of this
invention to be as follows:
In the primuline process of photography as introduced by Messrs. Green Cross
& Bevan, and now well known among photographers and described for example on
pages 657 & 658 of the British Journal of Photography published by Henry
Greenwood & Co. 2 York St. W.C. Oct. 17, 1890, instead of exposing the diazotised
fabric or paper or material to the action of light to obtain the impression I expose
it to the action of heat which produces a similar effect. For this it is convenient
to use a metal plate, stamp or roll, either cut by hand or photographically engraved,
heated to from 200° to 300° Centigrade.
Dated this 4th day of November 1890
EDWARD WILLIAM FOXLEE.
COMPLETE SPECIFICATION.
A New or Improved Primuline Printing Process.
We, EDWARD WILLIAM FOXLEE, 22 Goldsmith Road, Acton, London, W.,
Photographic Expert, and THOMAS BOLAS, 8 Grove Terrace, Chiswick, Analytical
Chemist, both in the County of Middlesex, do hereby declare the nature of this
invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
In the primuline process of photography, as introduced by Messrs. Green, Cross
and Bevan and now well known amongst photographers and described in the
Specification of Patent No. 7453 of the year 1890 and on pages 657 and 658 of the
British Journal of Photography published by Henry Greenwood & Co. of York
Street, Covent Garden, W.C., October 17, 1890, diazotised fabric, paper, or other
material, was submitted or exposed to the action of light to obtain any desired
impression by placing it, in either a wet or dry state, under the object or design to
be printed, and causing the rays of light to pass through or around the latter to
the diazotised fabric, paper, or material. According to our invention we dispense
with the action of light and substitute therefor the action of heat, whereby we
produce a novel printing process. In carrying the invention into effect we find it
convenient to employ a metal plate, stamp, roll, or stencil, either cut by hand,
etched, or photographically or otherwise engraved, but other suitable solid substance
may be employed, either as engraved plates, blocks or rolls, or as stencils; in
using these plates, blocks, or rolls, we first heat the same and then press them by
any suitable means upon the diazotised fabric, paper, or material, and afterwards
we submit the latter to a similar treatment to that used in the primuline photo-
graphic process after its submission to light, as described in the above mentioned
publication. In using a stencil we apply heat thereto in any convenient way, such
for example as by causing a highly heated block or roller to press thereon suffi-
ciently long to cause the change in the diazotised fabric, paper, or material,
through the interstices or perforations of the stencil but not long enough to cause
the heat to be transmitted through the solid part of the stencil. Or we cause
radiant heat or a current of hot air, gas or steam to act upon the diazotised fabric,
paper or material through the interstices or perforations of the stencil.
го
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page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The new or improved primuline printing process, substantially as herein
described.
2. A primuline printing process in which the action of heat is employed to obtain
the impression, substantially as herein described.
Dated this 3rd day of September 1891.
EDWARD W. FOXLEE.
THOMAS BOLAS.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.