Improvements in the Manufacture or Treatment of Paper for Cheques, Bank Notes, and the like.
Year: 1891

page_text: Date of Application, 3rd Sept., 1891
Complete Specification Left, 29th June, 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture or Treatment of Paper for
Cheques, Bank Notes, and the like.
I, ALBERT SCHLUMBERGER, of Montreuil near Paris, in the Republic of France,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is a process for producing safety paper, which
consists in making water marks on so-called splash paper, either coloured on white
ground or white on coloured ground.
Papers with water marks thus produced, are particularly adapted for the manu-
facture of cheques, bank notes or the like.
The improved process is in the main as follows:
First, splash paper is made, the fibres-producing the splashes of which are
previously coloured with sensible or durable colours according to the manner of
application of the paper. The paper thus produced is printed in an unsized state
with gummed water colours, in which are contained mordants or caustic substances,
at the places where the water mark is to appear, whereby the splashing in the
paper substance itself is so altered as to appear white on coloured ground. Or the
ground alone is imprinted, and the places where the water mark is to appear are left
free, whereby coloured water marks on white ground are produced.
To carry out the process, the white paper pulp is intimately mixed in a mixing
rag engine with coloured fibres, which produce the splashing of the paper. These
fibres, if the paper is to serve for cheques and similar valuable papers, are coloured,
after having been previously mordanted with tannic acid, with colouring matters
susceptible to acids or decolouring agents, as chlorine and the like; these colouring
matters either belong to the group of the aniline colours or are produced from
colour woods; red wood or yellow wood.
If the paper is to be employed for bank notes and similar valuable papers, the
fibres that are to produce the splashing are mordanted and coloured with durable
colours, for instance indigo, madder or alizarine and chrome-yellow or similar
colouring matters.
'
The splash paper is then imprinted with gummed water colours containing
mordants or caustic substances. For papers, the splash fibres of which are
coloured with sensible colours, printing colours are employed, which contain iron
salts.
The following proportions have proved advantageous:
a) For papers, the splash fibres of which are mordanted with tannic acid and
coloured with colour wood.
Dextrine water
11:4

page_text: of leaves or rolls through machines provided with running sheep wool cloths,
so that it remains perfectly even, and at the same time washed off with water;
subsequently it is guided over drying rolls, likewise provided with running sheep
wool cloths, dried and afterwards sized in the usual manner.
Dated this 3rd day of September 1891.
COMPLETE SPECIFICATION.
Improvements in the Manufacture or Treatment of Paper for
Cheques, Bank Notes, and the like.
I, ALBERT SCHLUMBERGER, of Montreuil, near Paris, in the Republic of France,
Manufacturer, 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 :-
The object of this invention is a process for producing safety paper, which
consists in making water marks on so-called splash paper, either coloured on
white ground, or white on coloured ground.
Papers with water marks thus produced are particularly adapted for the manu-
facture of cheques, bank notes or the like.
The improved process is in the main as follows:-
Splash paper is first made, the fibres of which producing the splashes are
previously coloured with sensitive or permanent colours according to the manner
of application of the paper. The paper thus produced is printed in an unsized
state, and at the places where the water mark is to appear, with gummed water
colours, in which are contained mordants or caustic substances, whereby the
splashing in the substance of the paper itself is so altered as to appear white
on coloured ground. Or the ground alone is imprinted and the places where
the water mark is to appear are left free, whereby coloured water marks on
white ground are produced.
To carry out the process, the white paper pulp is intimately mixed in a
mixing rag engine, with coloured fibres, which produce the splashing of the
paper. These fibres, if the paper is to serve for cheques and similar valuable
papers, are, after having been previously mordanted with tannic acid, coloured
with colouring matters susceptible to acids or decolouring agents, such as chlorine
and the like; these colouring substances either belong to the group of the aniline
colours or are produced from dye woods; red wood or yellow wood.
If the paper is to be employed for bank notes and similar valuable papers,
the fibres that are to produce the splashing are mordanted, and coloured with
durable colours, for instance, indigo, madder or alizarine and chrome-yellow or
similar colouring matters.
The splash paper is then imprinted with gummed water colours containing
mordants or caustic substances. For papers, the splash fibres of which are coloured
with sensitive colours, printing colours are employed, which contain iron salts.
The following proportions have proved advantageous:
(a) For papers, the splash fibres of which are mordanted with tannic acid and
Coloured with dve wood.
oloured with dve wood
Dextrine water
Glycerine
-
Sulphate of iron or other soluble iron salt
-
1 litre
0.25 litres
20 to 30 grammes

page_text: permeate the unsized paper, the paper is also made more transparent at the
respective places, so that the water mark in each case is distinctly separated.
from the ground and becomes quite visible.
The paper provided in this manner with water marks is passed in the form
of leaves, or rolls, through machines provided with travelling sheep's wool-cloths,.
so that it remains perfectly even, and is, at the same time, washed off with
water, subsequently it is guided over drying rolls, likewise provided with.
travelling sheep's wool-cloths, dried, and afterwards sized in the usual manner.
Having now particularly described and ascertained the nature of my said inven--
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A process for producing water marks on splash paper, consisting in dyeing
the fibres which produce the splashes before their mixture with the white paper
pulp with sensitive or permanent colours, in imprinting the splash paper thus
formed with gummed water colours which contain, in the case of sensitive
colours, iron salts, or, in the case of permanent colours, mordants or caustic
substances, by which means the splashed places are altered in such a way that,.
according as the places are imprinted for the water mark or the ground, when
sensitive colours are used, dark or variously coloured water marks appear on a
white ground, or a white water mark on a dark coloured ground; or, on the
other hand, when permanent colours are employed, white water marks appear
on a dark ground or coloured water marks on a white ground, after which the
paper is washed, dried and sized.
2. A mode of carrying out the process described in Claim t, consisting in
colouring the fibres which produce the splashing, before their insertion in the
paper pulp, by means of sensitive colours, such as dye wood extracts, alterable
by means of iron salts, or aniline colours capable of being destroyed by means
of powdered zinc and caustic soda, or with permanent colours, such as indigo,
madder, alizarine or chrome-yellow, which are capable of being destroyed by
chromic acid, red prussiate of potash or chloride of calcium.
3. A mode of carrying out the process described in Claim 1, consisting in
imprinting splash paper of the kind described with gum colour and iron salts at.
the places which are to bear the water mark, for the purpose of producing
dark or coloured water marks on a white ground, or, in the case of splashes
made with permanent colours, in imprinting the ground with gum colour with
which mordants or caustic materials are mixed, and afterwards washing out and
drying the imprinted paper.
4. A mode of carrying out the process described in Claim 1, consisting in
imprinting splashed paper of the kind described having splashes dyed with
permanent colours for the purpose of producing white water marks on dark
or coloured ground, at the places where the water marks are to be produced
with gum colours, with which mordants or caustic substances are mixed, or, in
the case of sensitive colours, imprinting the ground with gum colours and iron
salts and then washing and drying the imprinted paper.
5. The manufacture of splash paper which is provided with darker or coloured
water marks on a white ground, or with white water marks on darker or coloured.
ground, substantially as described in Claim 1.
Thi 00th day of Tune 1800
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant..