Photosensitive compositions having mixtures of alkoxy and non-alkoxy diazonium salt containing compounds

An imageable element comprising:

• an imaging layer comprising a mixture of an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent;
• a polyvinyl acetal binder;
• and
• a sheet substrate.

An imageable element comprising:

• an imaging layer comprising a mixture of an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazomum salt containing compound free of an alkoxy substituent;
• and
• a sheet substrate;
• wherein said imaging layer comprises a total aromatic diazonium salt containing compound content of at least 10 weight percent;
• and that the ratio of said aromatic diazonium salt containing compound having an alloxy substituent to said aromatic diazonium salt containing compound that is free of an alkoxy substituent is from about 1.0:1 to 70:1.

A method of producing an imaged element comprising the steps of:

• providing an imageable element selected from the group consisting of a first and a second imageable element;
• said first imageable element comprising an imaging layer which comprises a mixture of an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent;
• a polyvinyl acetal binder;
• and a sheet substrate;
• and said second imageable element comprising an imaging layer comprising a mixture of an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound free of an alkoxy substituent and a sheet substrate;
• wherein said imaging layer comprises a total aromatic diazonium salt containing compound content of at least 10 weight percent;
• and wherein the molar ratio of said aromatic diazonium salt containing compound having an alkoxy substituent to said aromatic diazonium salt containing compound that is free of an alkoxy substituent is from about 1.0:1 to 70:1;
• imagewise exposing said imageable element to radiation to produce exposed and unexposed regions;
• and
• contacting said imagewise exposed radiation-imageable element and a developer to selectively remove said unexposed regions.