PRESSURE SENSITIVE COPYING PAPER

PRESSURE SENSITIVE COPYING PAPER

PURPOSE:To provide pressure sensitive copying paper having excellent reading aptitude for an OCR device having reading wave-length in visible region of 600-700nm and without stain to be caused by change of coloring density and coloring fog. CONSTITUTION:3,3-bis-aminophenyl-azaphthalide derivative is...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: KUMAMOTO HIROSHI, SHIOZAKI TOMOHARU
Format: Patent
Sprache:eng
Schlagworte:
COLOUR PRINTING
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Beschreibung
Zusammenfassung:PURPOSE:To provide pressure sensitive copying paper having excellent reading aptitude for an OCR device having reading wave-length in visible region of 600-700nm and without stain to be caused by change of coloring density and coloring fog. CONSTITUTION:3,3-bis-aminophenyl-azaphthalide derivative is contained as a coupler of pressure sensitive copying paper, the coupler is put into a synthetic high polymer micro capsule, its average particle diameter is adjusted to 3-15 micron and average film thickness is adjusted to 0.1-0.7 micron, and salicylic acid derivative zinc salt is used as a coloring material for attaining the above- mentioned end.