US913128A - Art of coloring wood. - Google Patents

Art of coloring wood. Download PDF

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Publication number
US913128A
US913128A US46371508A US1908463715A US913128A US 913128 A US913128 A US 913128A US 46371508 A US46371508 A US 46371508A US 1908463715 A US1908463715 A US 1908463715A US 913128 A US913128 A US 913128A
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United States
Prior art keywords
wood
coloring
ammonia
portions
solution
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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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US46371508A
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William Augustus Hall
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AMERICAN MAHOGANY Co
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AMERICAN MAHOGANY Co
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Publication date
Application filed by AMERICAN MAHOGANY Co filed Critical AMERICAN MAHOGANY Co
Priority to US46371508A priority Critical patent/US913128A/en
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Publication of US913128A publication Critical patent/US913128A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/02Staining or dyeing wood; Bleaching wood

Definitions

  • e present invention has for its object to obviate the difficulties above referred to, so
  • a wood extract such as can be obtained from the wood or bark of trees which are rich in tannin (such as hemlock, oak and chestnut), and a greater or less quantity of this wood extract 13 mixed with the ammoniacal solution to produce the shades or colors desired.
  • the wood is first thoroughly dried, either by seasoning in the open air or by kiln dr ing, or by both. It is then preferably subjected, in a closed receptacle, to the action of a vacuum referably above 25 inches of mercury, and which will be sufficiently powerful and long continued to remove from the wood practically all the air therein contained, so as to make it absorbent or receptive to the fluids to be later applied.
  • a vacuum referably above 25 inches of mercury
  • ammoniacal solution with the colorin matter mixed therewith, is then introduce or drawn into the receptacle and a high hydraulic or air pressure (preferabl "from 300 to 800 pounds to the square inch is applied and maintained until the wood is thoroughly impre nated throu hout.
  • the coloring so ution is pre erably intro pokerd into the closed receptacle in a heated condition, at approximately 200 F., or is heated to about this temperature after being introduced-into the closed rece tacle.
  • Any of the low priced woods, such as eech, birch, maple, etc. may be treated by this process, and will be colored to a beautiful brown resembling black walnut by the ammoniacal solution with the wood extracts therein above mentioned.
  • the artificial coloring matter is largel deposited in the sap portions .of the woo while the ammonia, having a muchhi'ghe'r capillary speed of penetration, finds its way throughout the heart portions of the wood and colors the said heart portions a dark brown by chemical action on the wood, such coloring being uniform with the brown color imparted to the sap portions of the wood by the action of the ammonia with the addition of theartificial coloring matter.
  • the sap portions of the wood will be largely colored by the brown stain of theartificial coloring matter, although someprocess of treating the wood, which what colored by the chemical action of the,

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Description

- ammonia.
WILLIAM AUGUSTUS HALL, OF NEW YORK, N.
Y.,' ASSIGNOR .TO AMERICAN I MAHOGANY COMPANY, A CORPORATION OF MAINE.
ART OF COLORING WOOD.
Application filed May 13, 1907, Serial No. 373,229.
and of course it is very (lllIlCLlllJ to obtain lumber which is all sapor all heart. In the processes of treatin comparatively inexpensive woods, for the urpose of securin products closely resembling the higher priced wood, such as walnut, mahogany, etc.,.and in which processes coloring dyes alone or coloring chemicals mixed with coloring dyes are forced into and throughout the bodies of the woods, it'has heretofore been found impossible to obtain uniform colorsin the sap and heart portions of the woods. Where coloring solutions alone are employed the coloring matter becomes deposited principally in the sap portions of the woods,-so that such portions will become quite dark,
leaving the heart portions of the woods many shades lighter. When the woods are colored by a very penetrating chemical solution, such as an ammoniacal solution, it has been found that the heart portions of the woods (being very rich in tannic ligneous matter, or ligneous matter containing tannin, which is acted on bytheammonia) become darkened to a much greater extent than the saxhportions ofthe woods.
, e present invention has for its object to obviate the difficulties above referred to, so
as to -produce artificially colored woods in which the colors or shades will be substantially uniform throughout the heart and sap portions thereof.
In carrying the invention into effect, with aweak solutlon-of ammonia (say 2 gals. of 26% ammonia'in gals. of water) is mixed a coloring matter or dye which must either be soluble in the ammoniacal solution or be unafi'ected by ammonia.- In other words, the coloring 'matter or dye which is used must not be of an acid character so as to be precipitated from its solution by ammonia, nor one whose color would be destroyed by The coloring matter or dye Specification of Letters Patent.
Patented Feb. 23, 1909. Renewed November 20, 1908. Serial No. 463,715.
which is preferred for this urpose is a wood extract, such as can be obtained from the wood or bark of trees which are rich in tannin (such as hemlock, oak and chestnut), and a greater or less quantity of this wood extract 13 mixed with the ammoniacal solution to produce the shades or colors desired. r
In the is prefera ly in the form of boards, flitches or deals, the wood is first thoroughly dried, either by seasoning in the open air or by kiln dr ing, or by both. It is then preferably subjected, in a closed receptacle, to the action of a vacuum referably above 25 inches of mercury, and which will be sufficiently powerful and long continued to remove from the wood practically all the air therein contained, so as to make it absorbent or receptive to the fluids to be later applied. The ammoniacal solution, with the colorin matter mixed therewith, is then introduce or drawn into the receptacle and a high hydraulic or air pressure (preferabl "from 300 to 800 pounds to the square inch is applied and maintained until the wood is thoroughly impre nated throu hout.
The coloring so ution is pre erably intro duced into the closed receptacle in a heated condition, at approximately 200 F., or is heated to about this temperature after being introduced-into the closed rece tacle. Any of the low priced woods, such as eech, birch, maple, etc. may be treated by this process, and will be colored to a beautiful brown resembling black walnut by the ammoniacal solution with the wood extracts therein above mentioned. In forcing the solution into the wood,'by the high pressurereferred to, the artificial coloring matter is largel deposited in the sap portions .of the woo while the ammonia, having a muchhi'ghe'r capillary speed of penetration, finds its way throughout the heart portions of the wood and colors the said heart portions a dark brown by chemical action on the wood, such coloring being uniform with the brown color imparted to the sap portions of the wood by the action of the ammonia with the addition of theartificial coloring matter. 'In other words, the sap portions of the wood will be largely colored by the brown stain of theartificial coloring matter, although someprocess of treating the wood, which what colored by the chemical action of the,
wood, which contain larger proportions of ammonia; hile the heart portions of the 5 tannic ligneous matter than the sap portions of the wood, willbe wholly or principally colored by the chemical action of the hot ammonia; so that-in the resulting product the heart and sa portions of the wood will be uniformly co ored to the same, or practically the same, shades.
Having thus described my invention I claim and desire to secure by Letters Patent: A I
I. The herein-described process of coloring wood, consisting'm treating the same,
under a high pressure, with -anaqueous ammoniacal solution mixed with a suitable coloring dye.
2. The herein-described-process of coloring wood, consisting in treatingthesame,
: under a-hi h'pressure, with a hot aqueous ammoniaca coloring dye.
3. The herein-described process of coloringlwood, consisting in treating the same,
under a high pressure, with an aqueous ammonlacal solution 'mixed with a suitable wood extract.
4; The herein-described process of color ing wood, consisting in treating the same,
ing wood, consisting in e from the wood by a vacuunniprocess to ren-' solution mixed with a suitable 1 rocess of color the said solution and which is not injurable' by ammonia.
6.The herein-described rocess of coloring wood, consisting in exhausting the air from the wood by a vacuum rocess to render the wood absorbent, an then treating the same, under a high ressure, with a hot aqueous ammonia-cal so ution containing a suitable coloring matter which is soluble in the said solution'and which is not injurable by ammonia.
7. The herein-described rocess of colorder the wood absorbent, an then treating the same, under a. high pressure, with an aqueous ammoniacal solution containing a suitable colormg matter which 1s soluble 1n the said solution'and which is unaffected by ammonia, such coloring matter conslstlng of a wood extract, as hereinbefore described.
8. The herein-described process of coloring wood, consisting in exhausting the air from the wood-by a vacuum process to render the wood absorbent, and thentreating the same, under a'hi 'h pressure, with a hot aqueous ammoniaca solution containing a suitable coloring matter which is soluble in the said 1 solution and which is unaffected by 1111- monla, such coloring matter consistlng of a wood'extract, as hereinbefore described.
Irf testimony whereofiI aflix my signature,
in presence of two witnesses.
WILLIAM AUGUSTUS Witnesses:
JOHN C. MoCUsKER, O. M. SWEENEY.
HALL.
austing the air
US46371508A 1908-11-20 1908-11-20 Art of coloring wood. Expired - Lifetime US913128A (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4732817A (en) * 1986-04-21 1988-03-22 Lotz W Robert Wood preservation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4732817A (en) * 1986-04-21 1988-03-22 Lotz W Robert Wood preservation

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