Title: Photosensitive sheet materials

Abstract: Photosensitive sheet material, containing an acid-cleavable adduct of an image-forming first reactant and a reaction inhibitor together with a photolyzable source of halogen acid, which upon exposure to a light-image liberates said first reactant for reaction with a second reactant to produce a visible image, contains a controlled small amount of an acid acceptor for reducing backgrounding and increasing contrast in the resulting print.

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Inventors: Eian, Gilbert L. (White Bear, MN, US)

Application Number: 378526
Filing Date: 1973-07-12
Publication_date: 1976-01-27
Assignee: Minnesota Mining and Manufacturing Company (Saint Paul, MN)
Primary Class(es): 430/203 428/423.1, 430/202, 430/211, 430/235, 430/374, 430/495.1, 430/541
Other Classes:
US Patent Ref:

3146348	Aug, 1964	Workman	117/36.
3476562	Nov, 1969	Yamada et al.	96/88.
3502476	Mar, 1970	Itano et al.	96/90.
3533792	Oct, 1970	Petro	96/88.
3544321	Dec, 1970	Yamada et al.	96/88.
3617288	Nov, 1971	Hartman et al.	96/88.
3640718	Feb, 1972	Smith	96/48.

Other Refs:
Primary Examiner: Kelley, Mary F.
Assistant Examiner:
Attorney: Alexander, Sell, Steldt & DeLaHunt