Improvements in or connected with the Manufacture of Lead Pigments.
Year: 1896

page_text: Improvements in or connected with the Manufacture of Lead
Pigments.
I, JAMES FAIRLIE of 12 Waterloo Street, Glasgow, Shipowner, do hereby declare
the nature of this invention to be as follows:-
This invention relates to improvements in the manufacture of red lead.
When the red lead of commerce is mixed with oil, in the ordinary way for
applying as paint and allowed to stand the lead immediately commences to settle
to the bottom where in a short time it forms itself into a hard dry mass. This
causes considerable trouble, as it requires to be kept constantly stirred during use.
This feature also precludes its being sold ground with oil in the form of a paste,
which is considered the handiest and most efficient form for white lead and other
paiute which when ground with oil do not settle to the bottom.
To correct this add to the dry red lead a very small percentage of Chloride of
Soda, Sulphate of Maguesin, Sulphate of Soda, Aluriate of Magnesia, Muriate of
Lime, and Salts of Iodine, and Bromine, not more than one per cent. in all. Then
thoroughly mix together and levigate with water. After this dry off, either by
exposure to the air or by heat.
When sufficiently dry I add linseed oil as required and thoroughly mix same,
after which the whole is ground. The red lead will now remain in solution with
the oil and will not settle.
The benefits I claim for the above process are general utility, in so far that the
red lead mixed and ground in this way will be produced and placed on the market
in a much handier form for general use thau formerly, that as it will keep incor-
porate with the oil, it will cause less trouble while applying and will also be
applied with more uniformity and have greater covering power. It will also
be much more thoroughly mixed and incorporated with tho oil, than is possible
by the ordinary method, while the lead will retain all its present properties.
The above process also applies to orange lead.
Dated this 90th day of November 1806

page_text: Improvements in or connected with the Manufacture of Lead
Pigments.
I, JAMES FAIRLIE of 12 Waterloo Street, Glasgow, Shipowner, 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:-
This invention relates to improvements in the manufacture of red lead.
When the red lead of commerce is mixed with oil, in the ordinary way for
applying as paint and allowed to stand the lead immediately commences to settle
to the bottom where in a short time it forms itself into a hard dry mass. This
causes considerable trouble, as it requires to be kept constantly stirred during use.
This feature also precludes its being sold ground with oil in the form of a paste,
which is considered the handiest and most efficient form for white lead and other
paints which when ground with oil do not settle to the bottom.
To correct this I add to the dry red lead a very small percentage of Chloride of
Soda, Sulphate of Maguesia, Sulphate of Soda, Muriate of Magnesia, Muriate of
Lime and Sults of Iodine, and Bromine, (otherwise called Iodide of Potassium and
Bromide of Potassium) not more than one per cent in all. Then thoroughly mix
together and levigate with water. After this dry off, either by exposure to the air
or by heat.
When sufliciently dry I add linseed oil as required and thoroughly mix same,
after which the whole is ground. The red lead will now remain in solution with
the oil and will not settle.
The proportions of the before enumerated chemicals may be as follows:-
PECIFICATION.
Improvements in or connected with the Manufacture of Lead
Pigments.
I, JAMES FAIRLIE of 12 Waterloo Street, Glasgow, Shipowner, 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:-
This invention relates to improvements in the manufacture of red lead.
When the red lead of commerce is mixed with oil, in the ordinary way for
applying as paint and allowed to stand the lead immediately commences to settle
to the bottom where in a short time it forms itself into a hard dry mass. This
causes considerable trouble, as it requires to be kept constantly stirred during use.
This feature also precludes its being sold ground with oil in the form of a paste,
which is considered the handiest and most efficient form for white lead and other
paints which when ground with oil do not settle to the bottom.
To correct this I add to the dry red lead a very small percentage of Chloride of
Soda, Sulphate of Maguesia, Sulphate of Soda, Muriate of Magnesia, Muriate of
Lime and Sults of Iodine, and Bromine, (otherwise called Iodide of l'otassium and
Bromide of Potassium) not more than one per cent in all. Then thoroughly mix
together and levigate with water. After this dry off, either by exposure to the air
or by heat.
When sufliciently dry I add linseed oil as required and thoroughly mix same,
after which the whole is ground. The red lead will now remain in solution with
the oil and will not settle.
The proportions of the before enumerated chemicals may be as follows:-
Chloride of Soda
Sulphate of Magnesia
Sulphate of Soda
Muriate of Lime
Muriate of Magnesia
Iodide of Potassium
Bromide of Potassium
0.30
0.05
0.05
0.20
0.04
0.04
0.04
0.72 per cent.
The proportion of all or either of the foregoing may however be varied as found
most suitable.
The benefits I claim for the above process are general utility, in so far that the
red lead mixed and ground in this way will be produced and placed on the market
in a much handier form for general use than formerly, that as it will keep in-
corporated with the oil, it will cause less trouble while applying and will also be
applied with more uniformity and have greater covering power. It will also be
much moro thoroughly mixed and incorporated with the oil, than is possible by
the ordinary method, while the lead will retain all its present properties.
The above process also applies to orange lead.
Having now particularly described and ascertained the nature of my said inven-
tion aud in what manner it is to be performed, declare that what I claim
is:-
In the manufacture of lead pigments, the addition to the lead, whilst in a dry
state, of Chloride of Soda Sulphate of Magnesia, Sulphate of Soda. Muriate of

page_text: Lime, Muriate of Magnesia and Salts of Iodine and Bromine in the approximate
proportions as and for the purpose set forth.
Dated this 21st day of August 1807
JOHNSONS,
115 St. Vincent Street, Glasgow, Petitioner's Agents.