US1993920A - Etching compound - Google Patents

Etching compound Download PDF

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Publication number
US1993920A
US1993920A US690031A US69003133A US1993920A US 1993920 A US1993920 A US 1993920A US 690031 A US690031 A US 690031A US 69003133 A US69003133 A US 69003133A US 1993920 A US1993920 A US 1993920A
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US
United States
Prior art keywords
solution
compound
composition
etching compound
gelatine
Prior art date
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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US690031A
Inventor
Costa Frank
Munumer Candido
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Individual
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Individual
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Priority to US690031A priority Critical patent/US1993920A/en
Application granted granted Critical
Publication of US1993920A publication Critical patent/US1993920A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/16—Acidic compositions

Definitions

  • Our invention is a compound which will quickly etch or engrave metal such as steel, iron, tin, zinc and silver and is intended primarily for use in making finger prints, but it is, of course, capable of use wherever a permanent record is desired.
  • composition constituting our present invention consists of four ounces of water, one and one-fourth ounces of copper sulphate, one ounce of common salt, and one and one-half grams of gelatine.
  • the water is heated and the gelatine is then dissolved in the water.
  • Dry copper sulphate is mixed with the salt and this mixture is then dissolved in the gelatine solution, and when the solution has thoroughly cooled it will be ready for use.
  • the composition will be in liquid form and will retain its liquidity sothat it may be .very easily used, and whenapplied to a metal plate, the copper sulphate will effect a decolorization of the plate at those points where the compound touches the same.
  • the salt and the copper sulphate will combine to engrave the plate so that the lines will be permanent.
  • the gelatine in the compound will serve to impart some body thereto so that excessive spreading of the composition, when it is applied to a metal plate, will be avoided and the lines made thereby will be kept sharp and clear so that while the composition Will not assume a jelly-like form ⁇ it will not flow so freely as to defeat the purpose for which it is produced. 7
  • composition is inexpensive and is eflicient in producing a permanent record. It may be used for branding tools and other articles so as to provide positive identification and thereby aid in recovering the articles if they should be stolen or misplaced.
  • An etching composition consisting of water four ounces, copper sulphate one and one-quarter ounces, salt one ounce, and gelatine one and one-half grams.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Adornments (AREA)

Description

Patented Mar. 12, 1935 UNITED STATES PATENT OFFICE ETCHING COMPOUND Frank Costa and Candide Munumer, New York, N. Y.
1 Claim.
Our invention is a compound which will quickly etch or engrave metal such as steel, iron, tin, zinc and silver and is intended primarily for use in making finger prints, but it is, of course, capable of use wherever a permanent record is desired.
The composition constituting our present invention consists of four ounces of water, one and one-fourth ounces of copper sulphate, one ounce of common salt, and one and one-half grams of gelatine. The water is heated and the gelatine is then dissolved in the water. Dry copper sulphate is mixed with the salt and this mixture is then dissolved in the gelatine solution, and when the solution has thoroughly cooled it will be ready for use.
When it is desired to make a finger print, some of the solution may be poured upon a pad and then the finger pressed upon thepad so as to take up some of the solution. The finger bearing the solution is then pressed upon a metal plate and when the solution has dried a permanent print of the finger will appear. If it be desired to engrave a specimen of handwriting upon a plate, an ordinary pen may be dipped into the solution and then the name or other matter may be written upon a metal plate just as though it were being written on paper. Care should be observed to avoid overloading the pen and, of course, it will be advisable to operate quickly in order to avoid corrosion of the pen.
The composition will be in liquid form and will retain its liquidity sothat it may be .very easily used, and whenapplied to a metal plate, the copper sulphate will effect a decolorization of the plate at those points where the compound touches the same. The salt and the copper sulphate will combine to engrave the plate so that the lines will be permanent. The gelatine in the compound will serve to impart some body thereto so that excessive spreading of the composition, when it is applied to a metal plate, will be avoided and the lines made thereby will be kept sharp and clear so that while the composition Will not assume a jelly-like form} it will not flow so freely as to defeat the purpose for which it is produced. 7
The composition is inexpensive and is eflicient in producing a permanent record. It may be used for branding tools and other articles so as to provide positive identification and thereby aid in recovering the articles if they should be stolen or misplaced.
Having thus described the invention, we
claim: a
An etching composition consisting of water four ounces, copper sulphate one and one-quarter ounces, salt one ounce, and gelatine one and one-half grams.
FRANK COSTA. EL. s.] CANDIDO MUNUMER. [L. s.]
US690031A 1933-09-18 1933-09-18 Etching compound Expired - Lifetime US1993920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US690031A US1993920A (en) 1933-09-18 1933-09-18 Etching compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US690031A US1993920A (en) 1933-09-18 1933-09-18 Etching compound

Publications (1)

Publication Number Publication Date
US1993920A true US1993920A (en) 1935-03-12

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Family Applications (1)

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US690031A Expired - Lifetime US1993920A (en) 1933-09-18 1933-09-18 Etching compound

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1246353B (en) * 1960-11-26 1967-08-03 Siemens Ag Use of a viscosity-increasing agent in a caustic liquid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1246353B (en) * 1960-11-26 1967-08-03 Siemens Ag Use of a viscosity-increasing agent in a caustic liquid

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