IMPROVEMENTS IN THE MANUFACTURE OR
Year: 1882

page_text: LETTERS PATENT to Henry Hymans of Stepney Green in the County of
Middlesex for an Invention of IMPROVEMENTS IN THE MANUFACTURE OR
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-
LETTERS PATENT to Henry Hymans of Stepney Green in the County of
Middlesex for an Invention of IMPROVEMENTS IN THE MANUFACTURE OR
TREATMENT OF VEGETABLE PARCHMENT
"
PROVISIONAL SPECIFICATION left by the said Henry Hymans at the
Office of the Commissioners of Patents on the 12th September 1882.
HENRY HYMANS of Stepney Green in the County of Middlesex
IN THE MANUFACTURE OR TREATMENT OF VEGETABLE PARCHMENT
"
"
IMPROVEMENTS
This Invention relates to improvements in the manufacture or treatment of
vegetable parchment and has for its object to impart thereto increased suppleness,
toughness and elasticity and to render it capable of readily absorbing and retaining
moisture
In order to carry out my invention I treat the vegetable parchment or parchment
paper with a solution of Carbonate of Potash or Caustic Potash either alone or in
combination with Oleic or Stearic Acids (used either singly or together) and
Glucose, Gloy or other suitable equivalent by which means the material becomes
supple and elastic and very tough thus considerably enhancing its commercial
value
When Carbonate of Potash only is used I take a solution consisting of about
three parts of Carbonate of Potash dissolved in about 97 parts water and when
Caustic Potash is used I take about similar proportions of caustic potash and
water
In either case however such proportions may be varied according to the material
treated and the degree of suppleness required
I then steep the vegetable parchment in the solution allowing it to become
thoroughly saturated therewith after which I treat the same with Oleic or Stearic
acid by immersing it in one or other of these bodies after producing partial
saponification by mixing with a caustic alkali-I then treat the same with Glucose
or Gloy or other suitable equivalent either by immersion therein or by coating the
same therewith
Or I may dispense with one or all of such subsequent additions and treat it
either with the solution of Carbonate of Potash or of Caustic Potash alone
Or I may mix the Oleic or Stearic acid or the Glucose or Gloy or other suitable
equivalent with the solution of Carbonate of Potash, or of Caustic Potash and when
so combined treat the vegetable parchment therewith in a similar manner to that
already described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Hymans in the Great Seal Patent Office on the
12th March 1883.
HENRY HYMANS of Stepney Green in the County of Middlesex
IN THE MANUFACTURE OR TREATMENT OF VEGETABLE PARCHMENT
"IMPROVEMENTS
"
This Invention relates to improvements in the manufacture or treatment of
vegetable parchment and has for its object to impart thereto great suppleness
toughness and elasticity and also the necessary properties to render it capable of
readily absorbing and retaining moisture at a considerably reduced cost in
manufacture than has hitherto been practicable
I would here premise that on the 30th December 1876 Letters Patent N° 5060
were granted to me for my discovery of an improved application of Glycerine in
the treatment of vegetable parchment as fully described in the Specification of such
last mentioned Letters Patent Since the date of that discovery however the price
of glycerine has greatly advanced and such advance still continues to gradually
increase so that it became evident to me it was expedient to discover some efficient
and economical substitute or substitutes therefor by which the article commercially
known as Vegetable parchment or parchment paper might continue to .be
manufactured and supplied at as cheap or even a cheaper rate than hitherto
The following improved treatment which I will now proceed to particularly
describe is the result of my combined research and experiments and combines the
two essential advantages of effectiveness and economy
In order to carry out my invention I treat the vegetable parchment or parchment
paper with a solution of Carbonate of Potash or Caustic Potash either alone or in
combination with Oleic or Stearic Acid-(used either singly or together)-and
with Glucose, Gloy or any other suitable equivalent by which means the material
becomes supple and elastic and very tough thus considerably enhancing its
commercial value
When Carbonate of potash only is used I take a solution consisting of about
three parts of Carbonate of Potash dissolved in about 97 parts of water and when
caustic potash is used I take about similar proportions of caustic potash and water-
In either case however such proportions may be varied according to the material
treated and the degree of suppleness required
I then steep the vegetable parchment in the solution allowing it to become
thoroughly saturated therewith after which I treat the same with Oleic or Stearic
acid by immersing it in one or other of these bodies, after producing partial
saponification by mixing with a caustic alkali I then treat the same with Glucose
or Gloy or any other suitable equivalent either by immersion therein or by coating
the same therewith-Or I may dispense with one or all of such subsequent additions
and treat it either with a solution of Carbonate of Potash or of Caustic Potash
alone or of Glucose alone-Or I may mix the Oleic or Stearic acid in the Glucose
or Gloy or other suitable equivalent with the solution of Carbonate of Potash or of
Caustic Potash and when so combined treat the vegetable parchment therewith in
a similar manner to that already described
Having thus particularly described and ascertained the nature of my said
invention and the manner of carrying the same into effect I would have it under-
stood that I claim as novel and of my invention the treating the vegetable
parchment or parchment paper with a solution of Carbonate of Potash or Caustic
Potash or of Glucose either alone or in combination with Oleic or Stearic Acid

page_text: (used either singly or together) and with Glucose Gloy or any other suitable
equivalent substantially in the manner and for the purposes hereinbefore set forth
and described
In Witness whereof I the said Henry Hymans have hereunto set my hand
and seal this Twelfth day of March One thousand eight hundred and eighty
Witness,
ELT & Co Agents
33 Southampton Building*,
Holborn,
London.
HENRY HYMANS (LS.)