US1376961A - Method of coloring and finishing the surface of grain-leather - Google Patents

Method of coloring and finishing the surface of grain-leather Download PDF

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Publication number
US1376961A
US1376961A US31300619A US1376961A US 1376961 A US1376961 A US 1376961A US 31300619 A US31300619 A US 31300619A US 1376961 A US1376961 A US 1376961A
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United States
Prior art keywords
leather
grain
coloring
finishing
pigment
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Wyman H Meade
Sven H Friestedt
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Individual
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Priority to US31300619 priority Critical patent/US1376961A/en
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Publication of US1376961A publication Critical patent/US1376961A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal

Definitions

  • One object of our invention is to color and finish the surface of grain leather in such manner that when extremely light color effects are produced, the color will be even throughout the entire surface irrespective of any variation in color of the natural and at the same time the effect of the natural grain of the leather will not be destroyed. While we have described the main object as the production of light color effects, it will be understood however that our process is equally advantageous for dark effects, since even though the variation in color in the old method of coloring is not as noticeable in dark effects; nevertheless it is noticeable in many instances and by using our process, variation in shadeof coloring is eliminated for all shades produced.
  • Our invention consists primarily of applying an element to the surface of the leather; the element being secured by precipitation, for example, we take any com- Speeification of Letters Patent.
  • the element thus precipitated is used as a pigment for applying to the surface of the leather.
  • This precipitate can be applied to the grain-side of the leather in any way as a pigment either dry or mixed with a suitable carrier for covering or coloring the grain of the leather.
  • the application of this pigment will not destroy the wavy appearance of the leather and any instance where the pigment thus precipitated is metallic, as will be described hereinafter, there is no chance of transparency so that the finished leather will have the color of the precipitated pigment applied thereto.
  • One way of carrying out our invention is as follows Dissolve 249 parts of copper sulfate (CuSO -5H O) in water and add slowly 65 to 70 parts of zinc-dust Then filter off the precipitated metallic copper, wash free from soluble zinc salt. Then'wash it with at room temperature. When dry it is ready to apply to the leather either in dry form or mixed with some other pigment or carrying agent.
  • One way to do this is as follows Take 50 parts of the element made as above described, mix it with 200 parts of casein solution as carrier. Then apply to WYMAN H. MEADE. SVEN H. FRIESTEDT.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

OFFICE.
WYMAN H. MEADE AND SVEN' H. FRIESTEDT, 0F CAMDEN, NEW JERSEY.
METHOD OF COLORTNG AND FINISHING THE SURFACE OF GRAIN-LEATHER.
No Drawing.
T 0 all whom it may concern:
Be it known that we, /VYMAN H. MEADE, a citizen of the United States, and SvEN H. F RIESTEDT, a subject of the King of Sweden, both residing at Camden, county of Gamden, and State of New Jersey, have invented certain new and useful Improvements in Methods of Coloring and Finishing the Surface of Grain-Leather, of which the following is a specification.
It has always been difficult to provlde an even shade of coloring to the surface of grain leather, especially when light shades of color were desired. Numerous processes have been devised for securing light even shades by coating the leather with a heavv coating of pigment, thereby giving the shades but destroying the natural appearance of the grain of the leather in view of the fact that in order to cover up any variation in shade of'the natural leather, heavy coatings of the pigment were applied, said coatings being of sufficient thickness to fill the interstices and recesses on the surface of the leather thereby destroying the natural characteristics of the surface of the leather.
One object of our invention is to color and finish the surface of grain leather in such manner that when extremely light color effects are produced, the color will be even throughout the entire surface irrespective of any variation in color of the natural and at the same time the effect of the natural grain of the leather will not be destroyed. While we have described the main object as the production of light color effects, it will be understood however that our process is equally advantageous for dark effects, since even though the variation in color in the old method of coloring is not as noticeable in dark effects; nevertheless it is noticeable in many instances and by using our process, variation in shadeof coloring is eliminated for all shades produced.
The above objects, and other advantageous ends which will be described hereinafter, we attain in the following manner.
Our invention consists primarily of applying an element to the surface of the leather; the element being secured by precipitation, for example, we take any com- Speeification of Letters Patent.
'alcohol and dry Patented May 3, 1921.
Application filed July 24, 1919. Serial No. 313,006.
pound which is soluble and precipitate an element therefrom. The element thus precipitated is used as a pigment for applying to the surface of the leather. This precipitate can be applied to the grain-side of the leather in any way as a pigment either dry or mixed with a suitable carrier for covering or coloring the grain of the leather. In view of the extreme fineness of the particles of the pigment produced by the precipitation, the application of this pigment will not destroy the wavy appearance of the leather and any instance where the pigment thus precipitated is metallic, as will be described hereinafter, there is no chance of transparency so that the finished leather will have the color of the precipitated pigment applied thereto.
One way of carrying out our invention is as follows Dissolve 249 parts of copper sulfate (CuSO -5H O) in water and add slowly 65 to 70 parts of zinc-dust Then filter off the precipitated metallic copper, wash free from soluble zinc salt. Then'wash it with at room temperature. When dry it is ready to apply to the leather either in dry form or mixed with some other pigment or carrying agent. One way to do this is as follows Take 50 parts of the element made as above described, mix it with 200 parts of casein solution as carrier. Then apply to WYMAN H. MEADE. SVEN H. FRIESTEDT.
Witnesses:
CHAS. E. Po'r'rs, ANNA BENTON.
the leather and finish the same in any of the
US31300619 1919-07-24 1919-07-24 Method of coloring and finishing the surface of grain-leather Expired - Lifetime US1376961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US31300619 US1376961A (en) 1919-07-24 1919-07-24 Method of coloring and finishing the surface of grain-leather

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US31300619 US1376961A (en) 1919-07-24 1919-07-24 Method of coloring and finishing the surface of grain-leather

Publications (1)

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US1376961A true US1376961A (en) 1921-05-03

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Family Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952563A (en) * 1954-03-01 1960-09-13 United Shoe Machinery Corp Method of controlling the finishing of leather

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952563A (en) * 1954-03-01 1960-09-13 United Shoe Machinery Corp Method of controlling the finishing of leather

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