FR2236357A5 - Leuco-auramine copying process - leaving selected areas blank by coating areas of developer transfer sheet with a pigment - Google Patents

Leuco-auramine copying process - leaving selected areas blank by coating areas of developer transfer sheet with a pigment

Info

Publication number
FR2236357A5
FR2236357A5 FR7345013A FR7345013A FR2236357A5 FR 2236357 A5 FR2236357 A5 FR 2236357A5 FR 7345013 A FR7345013 A FR 7345013A FR 7345013 A FR7345013 A FR 7345013A FR 2236357 A5 FR2236357 A5 FR 2236357A5
Authority
FR
France
Prior art keywords
pigment
areas
auramine
leuco
transfer sheet
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
FR7345013A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 DE2324423A external-priority patent/DE2324423C2/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of FR2236357A5 publication Critical patent/FR2236357A5/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/0253—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using a chemical colour-forming ink, e.g. chemical hectography

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Color Printing (AREA)

Abstract

Printing from inverse originals using a leucoauramine layer which is transferred to developer sheets using alcohol as a wetting agent, the developer sheets are coated with magnesium aluminium silicate and then a pigment layer is applied in the areas which are required to be left blank. The pigment, pref. the same colour as the background, prevents the development of colour by the magnesium aluminium silicate. Used to omit restricted information etc. such as price.
FR7345013A 1973-05-15 1973-12-17 Leuco-auramine copying process - leaving selected areas blank by coating areas of developer transfer sheet with a pigment Expired FR2236357A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2324423A DE2324423C2 (en) 1972-05-24 1973-05-15 Process for the repair of steelworks molds, mold clamping plates and other objects made of cast iron

Publications (1)

Publication Number Publication Date
FR2236357A5 true FR2236357A5 (en) 1975-01-31

Family

ID=5880952

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7345013A Expired FR2236357A5 (en) 1973-05-15 1973-12-17 Leuco-auramine copying process - leaving selected areas blank by coating areas of developer transfer sheet with a pigment

Country Status (2)

Country Link
BE (1) BE815621A (en)
FR (1) FR2236357A5 (en)

Also Published As

Publication number Publication date
BE815621A (en) 1974-09-16

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Legal Events

Date Code Title Description
ST Notification of lapse