A New or Improved Preparation or Compound to be Used as a Sub- stitute for White Lead in the Preparation of Paints.
Year: 1899

page_text: Date of Application, 25th Aug., 1899
Complete Specification Left, 24th May, 1900-Accepted, 28th July, 1900
A New or Improved Preparation or Compound to be Used as a Sub-
stitute for White Lead in the Preparation of Paints.
I, GEORGE VON REINOLTS, of 2, Streatley Road, Brondesbury, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention to be as
follows:-
The invention has for its object a new or improved preparation or compound
to be used as a substitute for white lead in the preparation of paints which
preparation or compound whilst serving all the purposes of white lead has
greater covering properties, that is to say, it has greater opacity and will cover
a larger area than simple white lead and further such new or improved
preparation or compound will withstand the action of sulphuretted hydrogen or
other atmospheric or gaseous corrosives of white lead better than pure white
lead.
My new or improved preparation or compound in its most approved form
consists of a combination of carbonate of lead, sulphate of lead, oxide of
zinc, sulphate of lime and carbonate of lime. These materials are mixed together
in about equal proportions, although various proportions of such materials will
obtain more or less the desired result, and the compound is thoroughly ground
in oil to a thick paste. The chemical affinity existing between the ingredients
is of such a nature that the preparation or compound will completely answer
as a substitute for pure white lead for all painting purposes either alone
or mixed with other colored paint pigments.
I would remark that although I prefer to employ all the ingredients above
mentioned in the manufacture of my new or improved preparation or compound,
advantageous results may be obtained from a like compound in which either the
sulphate of lime or the carbonate of lime is omitted.
Dated this 25th day of August 1899
A New or Improved Preparation or Compound to be Used as a Sub-
stitute for White Lead in the Preparation of Paints.
I, GEORGE VON REINOLTS, of 2, Streatley Road, Brondesbury, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention and in
Price Rd

page_text: what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
The invention has for its object a new or improved preparation or compound
to be used as a substitute for white lead (Pb CO3) in the preparation of paints which
preparation or compound whilst serving all the purposes of white lead (Pb CO3) has
greater covering properties, that is to say, it has greater opacity and will cover
a larger area than simple white lead (Pb CO₂) and further such new or improved
preparation or compound will withstand the action of sulphuretted hydrogen or
other atmospheric or gaseous corrosives of white lead (Pb CO₂) better than pure
white lead.
My new or improved preparation or compound in its most approved form
consists of a combination of carbonate of lead (Pb CO₂) sulphate of lead, oxide of
zinc, sulphate of lime and carbonate of lime. These materials are mixed together
in about equal proportions, although various proportions of such materials will
obtain more or less the desired result, and the compound is thoroughly ground
in oil to a thick paste. The chemical affinity existing between the ingredients
is of such a nature that the preparation or compound will completely answer
as a substitute for pure white lead (Pb CU3) for all painting purposes either alone
or mixed with other colored paint pigments.
The use of the sulphate of lime and carbonate of lime neutralizes the acid
residues in the carbonate of lead and sulphate of lead, and renders the entire
compound less poisonous when used as a paint.
I would remark that although I prefer to employ all the ingredients above
mentioned in the manufacture of my new or improved preparation or compound,
advantageous results may be obtained from a like compound in which either the
sulphate of lime or the carbonate of lime is omitted.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. A new or improved preparation or compound to be used as a substitute for
white lead in the preparation of paints, such preparation or compound consisting
of the combination of carbonate of lead (Pb CO,), sulphate of lead, oxide of zinc,
sulphate of lime and carbonate of lime mixed together in about equal propor-
tions substantially as described and for the purpose stated.
2. A new or improved preparation or compound to be used as a substitute for
white lead in the preparation of paints, such preparation or compound consisting
of the combination of carbonate of lead (Pb CO), sulphate of lead, oxide of zinc
and sulphate of lime mixed together in about equal proportions substantially as
described and for the purpose stated.
3. A new or improved preparation or compound to be used as a substitute for
white lead in the preparation of paints, such preparation or compound consist-
ing of the combination of carbonate of lead (Pb CO₂) sulphate of lead, oxide of
zinc and carbonate of lime mixed together in about equal proportions substantially
as described and for the purpose stated.
Duted this 24th dow of Vow 1000
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.