| (19) |
 |
|
(11) |
EP 0 390 432 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.05.1991 Bulletin 1991/21 |
| (43) |
Date of publication A2: |
|
03.10.1990 Bulletin 1990/40 |
| (22) |
Date of filing: 23.03.1990 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE FR GB LI |
| (30) |
Priority: |
27.03.1989 JP 74725/89
|
| (71) |
Applicant: NIPPON PAPER INDUSTRIES CO., LTD. |
|
Kita-ku,
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Sakamoto, Masahiro,
c/o Oiso Branch
Naka-gun,
Kanagawa-ken (JP)
- Murano, Tsutomu,
c/o Oiso Branch
Naka-gun,
Kanagawa-ken (JP)
- Harada, Shozo,
c/o Oiso Branch
Naka-gun,
Kanagawa-ken (JP)
|
| (74) |
Representative: Cannon, David Lovell et al |
|
J.A. KEMP & CO.
14 South Square
Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB) |
|
| |
|
(57) The present invention relates to a color-former having microcapsules which comprise
an electron-donating colorless dye dispersed in a hydrophobic liquid. The present
invention provides a color-former using both an electron-donating colorless dye and
a hydrophobic liquid which were unable to be used under consideration of the solubility.