(19)
(11) EP 0 313 355 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.09.1989 Bulletin 1989/37

(43) Date of publication A2:
26.04.1989 Bulletin 1989/17

(21) Application number: 88309866.7

(22) Date of filing: 20.10.1988
(51) International Patent Classification (IPC)4: B41M 5/26
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 21.10.1987 JP 263731/87

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Hasegawa, Tetsuo
    Sumida-ku Tokyo (JP)
  • Kushida, Naoki
    Yokohama-shi Kanagawa-ken (JP)
  • Tamura, Yasuyuki
    Yokohama-shi Kanagawa-ken (JP)
  • Tohma, Koichi
    Tachikawa-shi Tokyo (JP)
  • Yaegashi, Hisao
    Yokohama-shi Kanagawa-ken (JP)
  • Suzuki, Takayuki
    Minamisaitama-gun Saitama-ken (JP)

(74) Representative: Beresford, Keith Denis Lewis 
BERESFORD & Co. 2-5 Warwick Court High Holborn
London WC1R 5DJ
London WC1R 5DJ (GB)


(56) References cited: : 
   
       


    (54) Thermal transfer material


    (57) A thermal transfer material comprising a support and at least a first ink layer and a second ink layer disposed in the order named on the support, wherein the adhesion strength F₁ between the support and the first ink layer and the adhesion strength F₂ between the first and second ink layers satisfy the relation of F₁ > F₂ at 90 °C. The thermal transfer material also provides a peeling strength of 1 - 5 g/cm at 90 °C. Two color recording is effected by superposing the thermal transfer material on plain paper, applying a pattern of heat and separating the thermal transfer material from the paper while changing the time from heating until the separation, i.e., temperature at the time of separation. Sharp edge-­cutting of the heated portion and the selective transferability of the second ink layer are ensured by the definition of the peeling strength.







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