Improvements in the Manufacture of Colored Marking Ink Pencils.
Year: 1898

page_text: Date of Application, 30th Nov., 1898-Accepted, 28th Jan., 1899
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Colored Marking Ink Pencils.
I, ALFRED ROBERTS, of 72, Hampstead Road, in the County of Middlesex,
Analytical Chemist, 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, that is to say:-
"
"
My invention relates more particularly to an improved manufacture of colored
marking ink pencils for marking cotton, linen, and other like fabrics and con-
sists essentially in manufacturing such articles from what are known to chemists
as the "thiobenzenyl colors"-comprising the color known to commerce as
primuline" also known by the commercial names of "carnotine," "polychromine,'
thiochromogen" "aurcoline" and "sulphine" and those colors manufacted
from "primuline" by the oxidation or methylation thereof, (or of dehydrothio-
toluidine-sulphonic acid), and severally known to commerce as "thioflarine or
chromine," "oxyphenine" or chloramine yellow." In carrying out my inven-
tion I take 50 parts of a thiobenzenyl color or colors to be used, and having
reduced the said color to a fine powder I form the same into a plastic condition
by the admixture and trituration therewith of any suitable excipient or excipients
-take for example,
"
"
'
Gum tragacanth in fine powder 10 parts.
accacia
-
-
""
Clarified sugar
20
China clay-
-
10
2”
271 25
But it is to be
adding water or any suitable aqeous vehicle to form a mass.
understood that the foregoing quantities are to be varied according to circum-
stances, and I do not bind myself to these proportions. I may also give various
tints to the mass aforementioned, by the addition to the above powders and gums
mentioned, of any suitable aniline dye, according to the shade required to be
produced, and I may simultaneously add thereto, such mordant or mordants as
may be adapted to the dye so used. I then mould or press the mass referred to
into the form of sticks for use in wooden cases, or strips, or points of the requisite
size and shape for insertion and use in ordinary propelling or everpointed"
pencil cases. When using the points strips sticks or pencils made as herein
described, the fabric to be marked, is first saturated with ordinary cold water,
then wrung out, marked, and simply allowed to dry either by natural course or
with heat.
"
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. The manufacture of colored marking ink pencils in which the "thiobenzenyl
colors are employed to form or constitute their bases, substantially as described.
2. In the manufacture of colored marking ink pencils in which" thiobenzeny!
·

page_text: colors" form the bases the combination with the "thiobenzenyl color" or colors
of a suitable excipient or vehicle with the addittion of aniline dye if required and
also a mordant or mordants if necessary forming a mass of sufficcient plasticity that
it may be readily formed into strips, or sticks for use in wooden cases, or pencil
holders, substantially as described.
3. Colored marking ink pencils manufactured substantially as hereinbefore
described and in which the essential component is "thiobenzenyl color" as afore-
mentioned.