TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The photoinitiator further contains an acetophenone compound, triazine compound, thiol compound, and at least one type of aromatic compound of formula (I).R1-R8 = hydrogen atom or halogen atom, substituted 1-6C alkyl group, substituted 1-6C cycloalkyl group, substituted 1-6C phenyl group or substituted 1-6C alkoxy group;X = -NR9-, -O- or -S-; andR9 = hydrogen atom or substituted 1-6C alkyl group.    TECHNOLOGY FOCUS - POLYMERS - Preferred Binder: The resin binder is a polymer which contains structural unit obtained from (i) an unsaturated carboxylic acid or (ii) unsaturated carboxylic acid and (meth)acrylate compound. The colored photosensitive resin composition contains a photopolymerization initiating adjuvant. SPECIFIC COMPOUNDS - The bisimidazole compound is 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl bisimidazole (claimed).    EXAMPLE - C.I. pigment green 36 (in weight parts)(7.17), C.I. pigment 150 (3.07) and polyester type pigment dispersant (2.36) were mixed with propylene glycol monomethyl ether acetate (55.3). The pigment was fully dispersed using a bead mill. Benzyl methacrylate/methacrylic acid copolymer (4.55) having polystyrene conversion weight average molecular weight of 35000 as resin binder, and mass composition ratio of 80/20, dipentaerythritol hexaacrylate KAYARAD DPHA (RTM) (2.26) as photopolymerizable monomer, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl bisimidazole (0.61), 4,4'-di(N,N'-diethyl amino) benzophenone (0.12), pentaerythritol tetrakis thio propionate (0.45) and cyclohexanone (23.7) were mixed. A colored photosensitive composition was obtained.    The composition was sequentially washed with neutral detergent, water and alcohol, then spin coated on a glass substrate, prebaked at 100 degrees C for 3 minutes. The interval of the resist pattern and photomask made from quartz glass was set to 100 microns after cooling, and irradiated with light of 50 mJ/cm2 under atmospheric condition. The irradiated substrate with coatings was immersed in aqueous developing solution containing nonionic surfactant (0.12%) and potassium hydroxide (0.04), for predetermined time. A coating film was developed, and post-baked at 220 degrees C for 30 minutes after water wash. The substrate after pre-baking, image development and post-baking was observed. The composition had sensitivity of 5 mJ/cm2, brightness of 52.6 and favorable pattern shape.