GB819781A - Improvements in and relating to tarnish-resisting materials - Google Patents

Improvements in and relating to tarnish-resisting materials

Info

Publication number
GB819781A
GB819781A GB2526954A GB2526954A GB819781A GB 819781 A GB819781 A GB 819781A GB 2526954 A GB2526954 A GB 2526954A GB 2526954 A GB2526954 A GB 2526954A GB 819781 A GB819781 A GB 819781A
Authority
GB
United Kingdom
Prior art keywords
chlorophyll
alcohol
contain
paper
solution
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
Application number
GB2526954A
Inventor
Edward George Stroud
John Ernest Rhoades-Brown
Lionel Leslie Frederic Deadman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB2526954A priority Critical patent/GB819781A/en
Publication of GB819781A publication Critical patent/GB819781A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
    • 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
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
    • 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
    • C23F15/00—Other methods of preventing corrosion or incrustation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Paper (AREA)

Abstract

819,781. Tarnish - resisting paper &c. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Aug. 31, 1955 [Aug. 31, 1954; June 1, 1955], Nos 25269/54 and 15734/55. Class 96. [Also in Group XVII] Tarnish-resisting paper, e.g. jewellers' tissue for wrapping silver &c., strawboard or millboard, for protecting metals from being tarnished by sulphur compounds, is made by coating or impregnating a web of paper &c., with at least 2 per cent by weight of chlorophyll or a substituted chlorophyll wherein the phytyl alcohol residue and a methyl group have been substituted, at least in part, by the residue of a straight-chain alcohol having the formula CnH 2n + 1 OH where n is 12, 14, 16, 18 or 20, applied in the form of a solution, the solvent then being evaporated. The chlorophyll may be water- or oil-soluble and may be, or include, sodium-, sodium-copper-, or sodiumpotassium-copper-chlorophyllin. The solution may contain sufficient non-corrosive wax, e.g. cetyl alcohol or ceto-stearyl alcohol and tannic acid to give to the paper the following relative proportions by weight : chlorophyll 1-2, wax 3-12, tannic acid 1-6. The solution may also contain an alkaline substance or an organic base. For example, solutions containing watersoluble chlorophyll may also contain borax or an alkali metal hydroxide, carbonate or bicarbonate such as sodium carbonate or bicarbonate. The paper may contain from 60 to 160 per cent of an alkali metal bicarbonate computed on the weight of chlorophyll. Solutions containing oil-soluble chlorophyll may also contain a primary, secondary or tertiary amine, an amino-alcohol such as mono-, di- or tri-ethanolamine, or morpholine. Water-soluble chlorophyll may be dissolved in aqueous ethyl alcohol. Oil-soluble chlorophyll may be dissolved in benzene, toluene or isopropyl alcohol, e.g. mixed with water when tannic acid is also to be taken into solution.
GB2526954A 1954-08-31 1954-08-31 Improvements in and relating to tarnish-resisting materials Expired GB819781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2526954A GB819781A (en) 1954-08-31 1954-08-31 Improvements in and relating to tarnish-resisting materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2526954A GB819781A (en) 1954-08-31 1954-08-31 Improvements in and relating to tarnish-resisting materials

Publications (1)

Publication Number Publication Date
GB819781A true GB819781A (en) 1959-09-09

Family

ID=10224967

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2526954A Expired GB819781A (en) 1954-08-31 1954-08-31 Improvements in and relating to tarnish-resisting materials

Country Status (1)

Country Link
GB (1) GB819781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106282984A (en) * 2016-08-25 2017-01-04 贵州苗妹银饰工艺品有限公司 Anti-silver tarnish agent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106282984A (en) * 2016-08-25 2017-01-04 贵州苗妹银饰工艺品有限公司 Anti-silver tarnish agent

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