GB647197A - Improvements relating to the coating of paper - Google Patents

Improvements relating to the coating of paper

Info

Publication number
GB647197A
GB647197A GB8866/47A GB886647A GB647197A GB 647197 A GB647197 A GB 647197A GB 8866/47 A GB8866/47 A GB 8866/47A GB 886647 A GB886647 A GB 886647A GB 647197 A GB647197 A GB 647197A
Authority
GB
United Kingdom
Prior art keywords
paper
silica
coating
water
gel
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
GB8866/47A
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.)
H P ANDREWS PAPER Co
Original Assignee
H P ANDREWS PAPER Co
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 H P ANDREWS PAPER Co filed Critical H P ANDREWS PAPER Co
Publication of GB647197A publication Critical patent/GB647197A/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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/775—Photosensitive materials characterised by the base or auxiliary layers the base being of paper

Abstract

647,197. Coated paper. ANDREWS PAPER CO., H. P. April 1, 1947, Nos. 8866, 8867 and 8868. Convention dates, April 18, 1945, Oct. 24, 1945 and Feb. 8, 1946. [Class 96] [Also in Group XX] Paper is provided with a surface coating of discrete sub-microscopic particles of silica. A colloidal water dispersion of silica, such as silica sol prepared by reacting a water soluble silicate with an acid, washing the resulting gel to remove electrolytes, covering the gel with an aqueous solution of sodium hydroxide to form hydroxyl ions therein, removing the gel from the solution and heating it while avoiding evaporation of water, may be applied to the paper by brush, roller coating or spraying methods, or, preferably, by immersion, and the silica precipitated on the paper by evaporation of the water ; or the coating may be produced by wetting the paper with sodium or other silicate and then reacting with alum. Ordinarily the paper should undergo a preliminary sizing process to inhibit penetration of the silica. An ink, dye, or sensitizing solution may be applied to the silica coating, and the latter has the effect of enhancing the contrast between the colour and the paper base.
GB8866/47A 1945-04-18 1947-04-01 Improvements relating to the coating of paper Expired GB647197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US647197XA 1945-04-18 1945-04-18

Publications (1)

Publication Number Publication Date
GB647197A true GB647197A (en) 1950-12-06

Family

ID=22057840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8866/47A Expired GB647197A (en) 1945-04-18 1947-04-01 Improvements relating to the coating of paper

Country Status (1)

Country Link
GB (1) GB647197A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973579C (en) * 1952-03-27 1960-03-31 Kalle & Co Ag Method for producing blueprint material
GB2159767A (en) * 1984-05-25 1985-12-11 Canon Kk Member for accepting markings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973579C (en) * 1952-03-27 1960-03-31 Kalle & Co Ag Method for producing blueprint material
GB2159767A (en) * 1984-05-25 1985-12-11 Canon Kk Member for accepting markings

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