Recording material containing diazo compounds and process for the manufacture thereof

US4317875A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Siegfried Scheler · Wiesbaden, DE
• Klaus Thoese · Wiesbaden, DE

Key dates

• Filing date: Oct 27, 1980
• Grant date: Mar 2, 1982
• Expiry date: Oct 27, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/132
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This invention relates to a recording material containing diazo compounds, in particular a microfilm, comprising a film base which is at least partially pervious to visible radiation, a light-sensitive layer and, on the reverse side of the film base, a filter layer which absorbs light in the long-wave ultraviolet spectral range and in the short-wave visible spectral range, wherein the filter layer is composed of a polymer which is insoluble or has been rendered insoluble by cross-linking, and of at least one yellow to orange-colored dye which is compatible with the constituents of the polymer and absorbs light in the range between about 360 nm and about 500 nm. The invention also relates to a process for the manufacture of a recording material.