An Improved Blue for Laundry Purposes in the Form of Crystals.
Year: 1889

page_text: Date of Application, 29th Mar., 1889
Complete Specification Left, 8th Apr., 1889
Complete Specification Accepted, 1st June, 1889
An Improved Blue for Laundry Purposes in the Form of Crystals.
I, GREEN ROBERT BISHOP KEMPTON trading as R. Bishop & Co. Abbey Road
West Ham Essex Cotton Mill Manager do hereby declare the nature of this inven-
tion to be as follows:
This Preparation I make by dissolving an Aniline or any Blue Colour in water &
thoroughly mixing with the Solution Sulphate of Aluminium & Potassium, and
Chloride of Sodium. 1 then concentrate this mixture, evaporate it, and set it aside
for the process of crystalisation.
+
I claim as my invention this Laundry Blue being produced for the Market and for
use in the distinctive Form of Blue Crystals; also I claim as an improvement for
this Preparation the natural attraction it has for the Fibres of any material through
the particular Chemicals employed in its production as the Sulphate of Aluminium
and Potassium has such an Affinity for all Textile Tissues & so great an attraction
for colouring matter and consequently when Linen, Cotton, Woollen or Silk Goods:
have been washed in the ordinary way and dipped in a weak Solution of these Blue
Crystals, they are more readily and speedily Blued as the colour is naturally attracted
to all the Fibres of the Cloth and an even colour is produced as the Crystals are
perfectly Soluble and leave no Sediment.
Again I claim as an advantage over all other descriptions of Laundry Blue it being
produced in such a convenient form for use, as any desired tint of the Blucing water:
can be obtained by adding few or more Crystals as required; it can be used in the
usual way of a Blue Bag or better and more quickly by pouring hot-water on some
of the Crystals in a Glass Tumbler, when the superiority of this Blue will be at once
manifest by its Clear & Brilliant Sapphire Colour.
Dated this 28th day of March 1889.
"
}
G. R. B. KEMPTON.
Fredk. Walker & Hyde,
4, Little Moorfields, London, E.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Blue for Laundry Purposes in the Form of Crystals.
1, GREEN ROBERT BISHOP KEMPTON, trading as R. Bishop & Co. Abbey Road
West Ham, Essex, Cotton Mill Manager, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:―
This Preparation I make by dissolving an Aniline or any Blue Colour in water and
thoroughly mixing with the Solution Sulphate of Aluminium & Potassium and
Chloride of Sodium; I then concentrate this Mixture, evaporate it, and set it aside
for the process of Crystalisation.
I claim as my invention this Laundry Blue being produced for the Market and for
use in the distinctive form of Blue Crystals; also I claim as an improvement for this
preparation the natural attraction it has for the Fibres of any material through the
particular Chemicals employed in its production, as the Sulphate of Aluminium and
Potassium has such an Affinity for all Textile Tissues and so great an attraction for
colouring matter and consequently when Linen, Cotton, Woollen or Silk Goods have
been washed in the ordinary way and dipped in a weak Solution of these Blue
Crystals, they are more readily and speedily Blued as the colour is naturally attracted
to all the Fibres of the Cloth and an even colour is produced as the Crystals are
perfectly soluble and leave no Sediment.
Again I claim as an advantage over all other descriptions of Laundry Blue it being
produced in such a convenient form for use, as any desired tint of the Blueing water
can be obtained by adding few or more Crystals as required; it can be used in the
usual way of a Blue Bag or better and more quickly by pouring hot water on some
of the Crystals in a Glass Tumbler, when the superiority of this Blue will be at once
manifest by its Clear & Brilliant Sapphire Colour.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
The Production of a Laundry Blue in the form of Crystals substantially as
herein described.
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