EP0037179A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Developer composition for lithographic printing plates, a method of plate development, and developed plates
Assignee: Mitsubishi Chemical Corp
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Filing: 1981-03-04
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Granted: —
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Expires: 2001-03-04
Abstract
Abstract A developed composition for a lithographic printing plate provided with a coated layer composed of a photosensitive polymer having in the main chain thereof groups of formula (I) wherein X and Y independently represent hydrogen, halogen, cyano or nitro and n is an integer of 1 or 2, comprising: (A) benzyl alcohol, (B) tetrahydrofurfuryl alcohol and (C) at least one acid selected from the group consisting of a mineral acid, an organic carboxylic acid and an organic sulfonic acid.
Inventors
- 👤 Shigeki Shimizu
- 👤 Akinobu Oshima
- 👤 Hiroshi Ide
- 👤 Noriaki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
39 words
A developer composition for a lithographic printing plate characterised in that it comprises: (A) benzyl alcohol, (B) tetrahydrofurfuryl alcohol and (C) at least one acid which is a mineral acid, an organic carboxylic acid or an organic sulfonic acid.
Claim 2
Dependent Claim
39 words
A developer composition for a lithographic printing plate characterised in that it comprises: (A) benzyl alcohol, (B) tetrahydrofurfuryl alcohol and (C) at least one acid which is a mineral acid, an organic carboxylic acid or an organic sulfonic acid.
Claim 3
Dependent Claim
30 words
A developer composition of claim 1, further characterised in that the amount of (A) benzyl alcohol in said developer composition is in the range of 5 to 90 wt. %.
Claim 4
Dependent Claim
23 words
A developer composition as claimed in claim 2 further characterised in that it comprises 30 to 70% by weight of (A) benzyl alcohol.
Claim 5
Dependent Claim
37 words
A developer composition as claimed in any one of claims 1 to 3 further characterised in that the amount of (B) tetrahydrofurfuryl alcohol in said developer composition is in the range of 5 to 90 wt. %.
Claim 6
Dependent Claim
23 words
A developer composition as claimed in claim 4 further characterised in that it comprises 10 to 40% by weight of (B) tetrahydrofurfuryl alcohol.
Claim 7
Dependent Claim
39 words
A developer composition as claimed in any one of claims 1 to 5, further characterised in that the amount of ( C ) the acid in said developer composition is in the range of 0.1 - 15 wt. %.
Claim 8
Dependent Claim
24 words
A developer composition as claimed in any one of claims 1 to 6 further characterised in that (C) the acid is a mineral acid.
Claim 9
Dependent Claim
18 words
A developer composition as claimed in claim 7, further characterised in that the mineral acid is phosphoric acid.
Claim 10
Independent Claim
107 words
A method of developing an image in a light exposed photosensitive coating of a lithographic printing plate, said coating composed of a photosensitive polymer having in the main chain thereof groups of the formula: wherein X and Y independently represent hydrogen, halogen, cyano or nitro, and n in an integer of one or two, comprising: washing the exposed portions of said exposed photosensitive coating from said plate with a developer solution and characterised in that the developer solution comprises: (A) benzyl alcohol, ( B ) tetrahydrofurfuryl alcohol and (C) at least one acid which is a mineral acid, an organic carboxylic acid or an organic sulfonic acid.
Claim 11
Independent Claim
107 words
A method of developing an image in a light exposed photosensitive coating of a lithographic printing plate, said coating composed of a photosensitive polymer having in the main chain thereof groups of the formula: wherein X and Y independently represent hydrogen, halogen, cyano or nitro, and n in an integer of one or two, comprising: washing the exposed portions of said exposed photosensitive coating from said plate with a developer solution and characterised in that the developer solution comprises: (A) benzyl alcohol, ( B ) tetrahydrofurfuryl alcohol and (C) at least one acid which is a mineral acid, an organic carboxylic acid or an organic sulfonic acid.
Claim 12
Dependent Claim
38 words
An image bearing developed lothographic printing plate characterised in that the plate has been developed using a developing composition as claimed in any one of claims 1 to 8 or by a method as claimed in claim 9.
References Cited (Backward Citations)
No citation records indexed.
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