Disclosed are a light sensitive planographic printing plate precursor and its processing method, the precursor comprising a hydrophilic support and provided thereon, a photopolymerizable light sensitive layer containing a compound represented by the following formula (1) or (2) and a compound represented by the following formula (3) or (4):

 
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< Planographic printing plate precursor, substrate for the same and surface hydrophilic material

< Photosensitive polymer, photoresist composition including the photosensitive polymer and method of forming a photoresist pattern using the photoresist composition

> Lithium salt of polyacetylene as radiation sensitive filaments and preparation and use thereof

> Positive type resist composition and resist pattern formation method using same
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