FR1265266A - Process for improving the whiteness of paper - Google Patents

Process for improving the whiteness of paper

Info

Publication number
FR1265266A
FR1265266A FR827532A FR827532A FR1265266A FR 1265266 A FR1265266 A FR 1265266A FR 827532 A FR827532 A FR 827532A FR 827532 A FR827532 A FR 827532A FR 1265266 A FR1265266 A FR 1265266A
Authority
FR
France
Prior art keywords
whiteness
paper
improving
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
FR827532A
Other languages
French (fr)
Inventor
Hendrik Adolf Pattyn
Willem Karel Koerber
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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
Priority claimed from GB16820/59A external-priority patent/GB967891A/en
Application filed by Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Priority to FR827532A priority Critical patent/FR1265266A/en
Application granted granted Critical
Publication of FR1265266A publication Critical patent/FR1265266A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/305—Additives other than developers
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B4/00—General methods for preserving meat, sausages, fish or fish products
    • A23B4/06—Freezing; Subsequent thawing; Cooling
    • A23B4/066—Freezing; Subsequent thawing; Cooling the materials not being transported through or in the apparatus with or without shaping, e.g. in the form of powder, granules or flakes
    • A23B4/068—Freezing; Subsequent thawing; Cooling the materials not being transported through or in the apparatus with or without shaping, e.g. in the form of powder, granules or flakes with packages or with shaping in the form of blocks or portions
    • 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
    • D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
FR827532A 1959-05-19 1960-05-18 Process for improving the whiteness of paper Expired FR1265266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR827532A FR1265266A (en) 1959-05-19 1960-05-18 Process for improving the whiteness of paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB16820/59A GB967891A (en) 1959-05-19 1959-05-19 Improvements in or relating to the production of surface-coated papers using brightening agents
FR827532A FR1265266A (en) 1959-05-19 1960-05-18 Process for improving the whiteness of paper

Publications (1)

Publication Number Publication Date
FR1265266A true FR1265266A (en) 1961-06-30

Family

ID=26186071

Family Applications (1)

Application Number Title Priority Date Filing Date
FR827532A Expired FR1265266A (en) 1959-05-19 1960-05-18 Process for improving the whiteness of paper

Country Status (1)

Country Link
FR (1) FR1265266A (en)

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