Abstract: An image formation method includes an ink ejection process of ejecting, from an inkjet head having a liquid-repellent film on an ejection surface thereof, an ink composition including: an oxidative-treated carbon black pigment having an average primary particle diameter of 25 nm or less and having an amount of oxygen of 5 atomic % or more on a surface thereof; a water-soluble nonionic compound including at least one selected from the group consisting of an ethyleneoxy chain and a propyleneoxy chain and in which a total number of the ethyleneoxy chain and the propyleneoxy chain is from 3 to 25; and water.

Abstract: An image formation method includes an ink ejection process of ejecting, from an inkjet head having a liquid-repellent film on an ejection surface thereof, an ink composition including: an oxidative-treated carbon black pigment having an average primary particle diameter of 25 nm or less and having an amount of oxygen of 5 atomic % or more on a surface thereof; a water-soluble nonionic compound including at least one selected from the group consisting of an ethyleneoxy chain and a propyleneoxy chain and in which a total number of the ethyleneoxy chain and the propyleneoxy chain is from 3 to 25; and water.

Abstract: A polyester film including terminal carboxylic groups in an amount of from 2 eq/t to 23 eq/t, wherein an amount of carboxylic groups on a surface of the film is from 0.005 eq/m2 to 0.2 eq/m2, and a thickness of the film is from 120 ?m to 500 ?m.

Abstract: A polyester film including terminal carboxylic groups in an amount of from 2 eq/t to 23 eq/t, wherein an amount of carboxylic groups on a surface of the film is from 0.005 eq/m2 to 0.2 eq/m2, and a thickness of the film is from 120 ?m to 500 ?m.

Abstract: An aqueous alkaline developing solution comprises an alkali compound, water and an alkylnaphthalene sulfonate having the following formula: ##STR1## in which R represents an alkyl group of 3 to 5 carbon atoms and q is 0 or an integer of 1 to 3, in the amount of 1 to 20 weight %. The aqueous alkaline developing solution further contains an anionic surface active agent of the specific sulfonate compound having a naphthalene ring and a polypolyoxyethylene moiety, in the amount of 0.1 to 10 weight % and an nonionic surface active agent having a polyoxyethylene moiety and an aromatic ring in its structure in the amount of 0.03 to 3 weight %, or contains an anionic surface active agent of the specific sulfonate compound having the specific aralkyl-substituted benzene ring and a polypolyoxyethylene moiety.

Abstract: Disclosed is an image forming process employing a light-sensitive image forming material and a developing solution. The image forming material comprises a support and either a light-sensitive resin layer containing a pigment or a colorant layer containing a pigment and a light-sensitive resin layer, superposed in order. The process comprises the steps of imagewise exposing the image forming material to light and developing the material by the use of an alkaline developing solution containing at least one of compounds having the following formula (1): ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represents hydrogen, an alkyl group having 1 to 5 carbon atoms which may be substituted or an aryl group which may be substituted, M.sup.1 represents hydrogen, potassium or an ammonium group, Y represents hydrogen or --SO.sub.3 M.sub.2 (in which M.sup.2 represents sodium, potassium or an ammonium group and M.sup.2 may be the same as or different from M.sup.

Abstract: A photosensitive material either comprises a support, a peel layer, a barrier layer and a coloring material-containing photosensitive layer or a laminate of a coloring material layer and a photosensitive layer, superposed in order, or comprises a support having a releasing surface, an intermediate layer instead of both the peel layer and the barrier layer as mentioned above, a coloring material-containing photosensitive layer or a laminate of a coloring material layer and a photosensitive layer, superposed in order. The barrier layer or the intermediate layer comprises a polymer having a glass transition temperature not higher than 70.degree. C.