CA940301A - Concealed printing process and development system for same - Google Patents

Concealed printing process and development system for same

Info

Publication number
CA940301A
CA940301A CA106,297A CA106297A CA940301A CA 940301 A CA940301 A CA 940301A CA 106297 A CA106297 A CA 106297A CA 940301 A CA940301 A CA 940301A
Authority
CA
Canada
Prior art keywords
same
printing process
development system
concealed printing
concealed
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
CA106,297A
Inventor
Richard E. Thomas
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.)
AB Dick Co
Original Assignee
AB Dick 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 AB Dick Co filed Critical AB Dick Co
Application granted granted Critical
Publication of CA940301A publication Critical patent/CA940301A/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
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/001—Printing processes to produce particular kinds of printed work, e.g. patterns using chemical colour-formers or chemical reactions, e.g. leuco dyes or acids
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B3/00—Manually or mechanically operated teaching appliances working with questions and answers
    • G09B3/06—Manually or mechanically operated teaching appliances working with questions and answers of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made
    • G09B3/08—Manually or mechanically operated teaching appliances working with questions and answers of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made of chart form
    • G09B3/085—Manually or mechanically operated teaching appliances working with questions and answers of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made of chart form with invisibly printed correct answer; the answer being rendered visible by special optical means, e.g. filters; mirrors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Color Printing (AREA)
CA106,297A 1970-03-16 1971-02-25 Concealed printing process and development system for same Expired CA940301A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1995570A 1970-03-16 1970-03-16

Publications (1)

Publication Number Publication Date
CA940301A true CA940301A (en) 1974-01-22

Family

ID=21795979

Family Applications (1)

Application Number Title Priority Date Filing Date
CA106,297A Expired CA940301A (en) 1970-03-16 1971-02-25 Concealed printing process and development system for same

Country Status (6)

Country Link
BE (1) BE764350A (en)
CA (1) CA940301A (en)
DE (1) DE2112380A1 (en)
FR (1) FR2084649A5 (en)
GB (1) GB1350930A (en)
NL (1) NL7103180A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272106A (en) 1979-10-10 1981-06-09 Minnesota Mining And Manufacturing Company Copy sheet

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022760A1 (en) * 1979-02-16 1981-01-21 Amplikart S.P.R.L. Self corrector for multiple-choice questionnaire
US5310627A (en) * 1992-12-15 1994-05-10 Minnesota Mining And Manufacturing Company Changing the color of yellow resist images by application of pH-sensitive dyes
EP2199094A1 (en) 2008-12-22 2010-06-23 Mondi Uncoated Fine & Kraft Paper GmbH Method for chromophoric illustration of surfaces
US20120038701A1 (en) 2008-12-22 2012-02-16 Thomas Schalkhammer Method for the colour-imparting inscribing of surfaces
EP2264110A1 (en) 2009-06-17 2010-12-22 Mondi Uncoated Fine & Kraft Paper GmbH Reactive ink for chromophoric illustration of surfaces
EP2325018A1 (en) 2009-11-24 2011-05-25 Mondi Uncoated Fine & Kraft Paper GmbH Thermally sensitive recording material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272106A (en) 1979-10-10 1981-06-09 Minnesota Mining And Manufacturing Company Copy sheet

Also Published As

Publication number Publication date
FR2084649A5 (en) 1971-12-17
GB1350930A (en) 1974-04-24
BE764350A (en) 1971-08-16
NL7103180A (en) 1971-09-20
DE2112380A1 (en) 1971-10-07

Similar Documents

Publication Publication Date Title
CA930161A (en) Concealed printing process and development and materials for same
CA937028A (en) Pseudoboehmitic alumina and process for making same
CA949824A (en) Development apparatus and process
CA934233A (en) Development apparatus and process
CA937978A (en) Transfer and development process
CA940301A (en) Concealed printing process and development system for same
CA965087A (en) Processes for preparing mannose and mannose derivatives
CA956588A (en) Printing assemblies and method
CA946466A (en) Printing system and method
CA972504A (en) Process for fixing prints and pad-dyeings
CA956317A (en) Pyridyl-methoxyamines and process for preparing same
CA944355A (en) N-vinyl-quinolones and process for their preparation
CA963472A (en) Cycloalkano-quinolone derivatives and process for their preparation
CA942304A (en) Nitrofuryl-amidine derivatives and process for their preparation
CA836777A (en) Printing apparatus and method
CA941611A (en) Duplicating systems
CA841013A (en) Hydrocortisone derivatives and process
CA838869A (en) Projection system and method
CA934234A (en) Development process and apparatus
CA857880A (en) Cycloheptadienes and process for preparing same
CA835393A (en) 4-hydroxy-quinolines and process for preparing same
CA850381A (en) Methods and apparatus for printing
CA859660A (en) Copy-sheet and method
CA963323A (en) Multicolor prints and process for preparing same
CA849018A (en) Perfluoro-tertiary-alkanols and process for their preparation