Improved Process of Applying Luminous Preparation to the Surface of Paper or other Substances.
Year: 1889

page_text: Date of Application, 14th Sept., 1889
Complete Specification Left, 14th May, 1890-Accepted, 21st June, 1890
PROVISIONAL SPECIFICATION.
Improved Process of Applying Luminous Preparation to the Surface
of Paper or other Substances.
:
We, JAMES ALBERT CAUSTON, of the firm of Sir Joseph Causton & Sons, of No. 9
Eastcheap in the City of London, Printer, and JAMES CHALLIS, of No. 9 Eastcheap in
the City of London, Commercial Traveller, do hereby declare the nature of this inven-
tion to be as follows:-
In our invention we use the chemically prepared powder which is the acting
ingredient in the well known luminous paint, and which has the property of
absorbing rays of light and afterwards emitting them in the dark. By our process
we are able to produce luminous designs of great delicacy and beauty, and with
the least possible expenditure of the luminous preparation; a result hitherto
unattainable by the method in vogue of washing or painting it on.
We prepare
an adhesive composition with which we print the required design upon the surface
of the paper or other substance, from type, blocks, or lithographic stones, and
while the composition is still wet or "tacky we dust or flock the luminous
powder upon it.
"
For certain purposes we mix the luminous powder with the adhesive composition
and impress the compound so prepared direct upon the surface to be printed.
Dated this 14th day of September 1889.
I
.
JAMES ALBERT CAUSTON.
J. CHALLIS.
COMPLETE SPECIFICATION.
Improved Process of Applying Luminous Preparation to the Surface
of Paper or other Substances.
We, JAMES ALBERT CAUSTON of the firm of Sir Joseph Causton & Sons of No. 9
Eastcheap in the City of London, Printer, and JAMES CHALLIS of No. 9 Eastcheap
in the City of London Commercial Traveller, 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 :--
Our improved process consists in printing any design or pattern in an adhesive
composition, such as gold size or mucilage, upon paper or other substance from
type, blocks or lithographic stones by an ordinary printing press or otherwise;
and while the design is still wet or tacky dusting or flocking upon it a layer of
the chemical compound known as luminous powder, which has the property of
absorbing rays of light and afterwards emitting them in the dark; being the
acting ingredient in the well known luminous paint and composed of sulphur and
lime.
=
To obtain a greater body of the luminous powder we sometimes mix a portion of it
with the mucilage used in printing the design, and afterwards dust on the powder.
The non luminous portions of the design are printed in the usual manner.
We are aware that luminous designs have been produced by painting, and also
by washing or coating the entire surface with luminous paint, and stopping out
the required non luminous portion by printing or otherwise. These methods,
however, involve a very large consumption of the luminous compound, while the
effect obtained both on the luminous and the stopped out portions is extremely
coarse; whereas by our improved process we can produce designs of very great
delicacy and beauty with the least possible expenditure of material.”

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 process of "Luminous Printing" by printing designs in a luminous
mucilagenous compound upon paper or other substances from blocks, type or litho-
graphic stones, substantially as described.
2. The process of Luminous Printing by printing designs in a mucilagenous
compound, upon paper or other substances, from blocks, type or lithographic stones
and afterwards coating with luminous powder, substantially as described.
Dated this 9th day of May 1890.
JAMES CHALLIS.
J. ALBERT CAUSTON.