A-146: N,N,N’,N’-Tetramethyl-1,4-diaminobutane 

A-147: 1,5-Diaminopentane 

A-148: 2,2-Dimethyl-1,5-diaminopentane 

A-149: N,N-Dimethylneopentanediamine 

A-150: 1,6-Diaminohexane 

A-151 : N ,N’ -Dimethy 1-1,6-diaminohexane 

A-152: 1,7-Diaminopentane 

A-153: 1,8-Diaminooctane 

A-154: 2-(2’-Aminoethylamino)ethanol 

A-155: 2-[(2’-Aminoethylamino)ethylamino]ethanol 

A-156: 3,3’-Diaminopropylamine 

A-157: Piperazine 

A-158: N-Methylpiperazine 

A-159: N,N’-Dimethylpiperazine 

A-160: 1-(2’-Aminoethyl)piperazine 

A-161: Hexamethylenetetramine 

A-162: 1,4-Diazabicyclo[2,2,2]octane 

A-163: Polyethyleneimine 

A-164: Pyridine 

A-165: 2-Acetylpyridine 

A-166: 3-Aminopyridim:: 

A-167: 3-Bromopyridine 

A-168: 4-Ethylpyridine 

A-169: 3-n-Butylpyridine 

A-170: 2-Picoline 

A-1 71 : Nicotinic acid amide 

A-172: 2-Methoxypyridine 

A-173: 5-Aminoquinoline 

A-174: 5 ,6, 7 ,8-Tetrahydroisoquinoline 

A-175: 3-Methylpyridazine 

A-176: 2-Aminopyrimidine 

A-1 77: Pyrimidine 

A-1 78: Pyrazine 

A-179: 2-Methylpyrazine 

A-180: Cinnoline 

A-181: Quinazoline 

A-182: Quinoxaline 

A-183: Phthalazine 

A-184: Phenazine 

A-185: 9-Aminoacridine 

A-186: H$_{2}$N(CH$_{2}$CH$_{2}$ NH)zH 

A-187: H$_{2}$N(CH$_{2}$CH$_{2}$ NH)$_{3}$H 

A-188: H$_{2}$N(CH$_{2}$ CH$_{2}$NH)$_{4}$H 

A-189: H$_{2}$N(CH$_{2}$ CH$_{2}$CH$_{2}$NH)zH 

A-190: H$_{2}$N(CH$_{2}$ CH$_{2}$CH$_{2}$NH)$_{3}$H 

A-191: H$_{2}$N(CH$_{2}$ CH$_{2}$CH$_{2}$NH)$_{4}$H 

A-192: (CH$_{3}$)zNCH$_{2}$ CH$_{2}$OCH$_{2}$CH$_{2}$N(CH$_{3}$ )z 

A-193: (CH$_{3}$)zN-(CH$_{2}$ CH$_{2}$O)zCH$_{2}$CH$_{2}$N(CH$_{3}$ )z 

A-194: (CH$_{3}$)zN-(CH$_{2}$ CH$_{2}$OhCH$_{2}$CH$_{2}$N(CH$_{3}$ )z 

A-195: (CH$_{3}$)zN-(CH$_{2}$ CH$_{2}$O)$_{4}$CH$_{2}$CH$_{2}$N(CH$_{3}$ )z 

A-196: (CH$_{3}$)zNCH$_{2}$ CH$_{2}$SCH$_{2}$CH$_{2}$N(CH$_{3}$ )z 

A-197: (CH$_{3}$)zN-(CH$_{2}$ CH$_{2}$S)$_{2}$CH$_{2}$CH$_{2}$N(CH$_{3}$ ) 2 

A-198: (CH$_{3}$)zN-(CH$_{2}$ CH$_{2}$ShCH$_{2}$CH$_{2}$N(CH$_{3}$ ) 2 

A-199: (CH$_{3}$)zN-(CH$_{2}$ CH$_{2}$S)$_{4}$CH$_{2}$CH$_{2}$N(CH$_{3}$ )z t,0950 

The compounds shown by formulae (C-1), (C-11), (C-III), and (C-IV) for use in this invention are all known com› pounds and are commercially available as reagents or indus- 

trial chemicals. 

The addition amount of each of the compounds shown by formulae (C-1), (C-11), (C-III), (C-IV) for use in this inven› tion to the developer is from 0.01 g to 100 g, and preferably from 0.1 g to 50 g per liter of the developer. The foregoing compounds may be used singly or as a combination of them. 

For adding the compounds shown by formulae (C-I), (C-11), (C-III), and (C-IV) for use in this invention to the developer, they may be added thereto as a solution thereof in water or an organic solvent miscible with water, such as methanol, ethanol, triethylene glycol, diethylene glycol, etc. Furthermore, these compounds may be directly added to the developer. 

Then, the reductone compounds which are used for the developer of the present invention are generally lmown as endiol type compounds, enaminol type compounds, endi› amine type compounds, thiol-enol type compounds, and enarninethiol type compounds. 

Examples of these compounds are described in U.S. Pat. No. 2,688,549 and JP-A-62-237443. The synthesis methods of these reductone compounds are well known and they are described in-detail, e.g., in Yuuji Nomura and Hirohisa Oomura, Reductone no Kagaku (Chemistry of Reductone), published by Uchida Rookakuho Shinsha K.K., 1969. 

The particularly preferred reductone compounds for use in this invention are the compounds shown by formula (I) described above. 

Then, specific examples of the particularly preferred reductone compounds for use in this invention are shown below. 

Examples of the endiol type reductone compound: t,0IJ!JI) 

Examples of other reductone compounds: t,Hlrn 

The reductone compounds for use in this invention can be used as the forms of the alkali metal salts such as lithium salts, sodium salts, potassium salts, etc. It is preferred that the reductone compound is used in an amount of from l to 100 g per liter of the developer. 

For the developer of this invention, an aminophenol derivative developing agent is used. As the aminophenol derivative developing agent, there are 4-aminophenol, 4-amino- 3-methylphenol, 4-(N-methyl)aminophenol, 2,4- diaminophenol, N-(4-hydroxyphenyl)glycine, N-(2’-hy› droxyethyl)- 2-arninophenol,2-hydroxymethyl-4-aminophc› nol, 2-hydroxymethyl-4-(N-methyl)arninophenol, etc., and the hydrochlorides and sulfates of these compounds, and N-methyl- 4-aminophenol sulfate (Metal) is particularly preferred. The addition amount of the aminophenol deriva› tive developing agent to the developer is from 0.5 g to 10 g per liter of the developer. 

It is preferable that the developer further contains a preservative and alkali in addition to the foregoing necessary components. 

As the preservative, sulfites can be used. As the sulfites, there are sodium sulfite, potassium sulfite, lithium sulfite, ammonium sulfite, sodium bisulfite, potassium bisulfite, potassium metabisulfite, etc. The addition amount of the preservative is preferably not more than 0.5 mol per liter of the developer. 

The alkali (alkali agent) is added to the developer for controlling pH of the developer to 9 or higher, and prefer› ably from 10 to 11. As the alkali agent being used for adjusting pH, an ordinary water-soluble inorganic alkali metal salt such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, potassium tertiary phosphate, etc., can be used. 

The developer of this invention can also contain, if necessary, a water-soluble acid (e.g., acetic acid and boric 

