JPH0154706B2 - - Google Patents

Info

Publication number
JPH0154706B2
JPH0154706B2 JP62091753A JP9175387A JPH0154706B2 JP H0154706 B2 JPH0154706 B2 JP H0154706B2 JP 62091753 A JP62091753 A JP 62091753A JP 9175387 A JP9175387 A JP 9175387A JP H0154706 B2 JPH0154706 B2 JP H0154706B2
Authority
JP
Japan
Prior art keywords
paper
printing layer
characters
reflection density
pattern
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
JP62091753A
Other languages
English (en)
Japanese (ja)
Other versions
JPS63256980A (ja
Inventor
Keitaro Mitsui
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.)
HOSOKAWA KATSUPANSHO KK
Original Assignee
HOSOKAWA KATSUPANSHO KK
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 HOSOKAWA KATSUPANSHO KK filed Critical HOSOKAWA KATSUPANSHO KK
Priority to JP62091753A priority Critical patent/JPS63256980A/ja
Publication of JPS63256980A publication Critical patent/JPS63256980A/ja
Publication of JPH0154706B2 publication Critical patent/JPH0154706B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Credit Cards Or The Like (AREA)
  • Cleaning In Electrography (AREA)
JP62091753A 1987-04-14 1987-04-14 再コピ−不能用紙 Granted JPS63256980A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62091753A JPS63256980A (ja) 1987-04-14 1987-04-14 再コピ−不能用紙

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62091753A JPS63256980A (ja) 1987-04-14 1987-04-14 再コピ−不能用紙

Publications (2)

Publication Number Publication Date
JPS63256980A JPS63256980A (ja) 1988-10-24
JPH0154706B2 true JPH0154706B2 (en, 2012) 1989-11-20

Family

ID=14035297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62091753A Granted JPS63256980A (ja) 1987-04-14 1987-04-14 再コピ−不能用紙

Country Status (1)

Country Link
JP (1) JPS63256980A (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3242971B2 (ja) * 1992-02-27 2001-12-25 キヤノン株式会社 画像処理装置およびその方法
US6421145B1 (en) 1992-09-28 2002-07-16 Canon Kabushiki Kaisha Image processing apparatus and method using image information and additional information or an additional pattern added thereto or superposed thereon
JP3566334B2 (ja) * 1994-03-25 2004-09-15 キヤノン株式会社 画像処理装置およびその方法

Also Published As

Publication number Publication date
JPS63256980A (ja) 1988-10-24

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Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

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LAPS Cancellation because of no payment of annual fees