SILVER INK COMPOSITION

PROBLEM TO BE SOLVED: To provide a silver ink composition prepared by compounding a material for forming a metal silver, which allows formation of a fine pattern of metal silver with little fluctuations of a resistance value even when the ink composition is subjected to continuous printing.SOLUTION: The silver ink composition is prepared by compounding a β-ketocarboxylic acid silver represented by general formula (1), at least one nitrogen-containing compound selected from the group consisting of an amine compound having 25 carbon atoms or less, a quaternary ammonium salt having 25 carbon atoms or less, ammonia, and ammonium salt produced by the reaction of the amine compound or ammonia with an acid, at least one reducing agent selected from the group consisting of oxalic acid, hydrazine and a compound represented by general formula (5) H-C(=O)-R21, and acetylene alcohols represented by general formula (2) below. The silver ink composition has a b* value of -0.60 to -0.10 in the L*a*b* color system.SELECTED DRAWING: None 【課題】連続印刷に供した場合でも、抵抗値の変動が小さい金属銀の微細パターンを形成可能な、金属銀の形成材料が配合されてなる銀インク組成物の提供。【解決手段】下記一般式（１）で表わされるβ−ケトカルボン酸銀と、炭素数２５以下のアミン化合物、炭素数２５以下の第４級アンモニウム塩、アンモニア、及び前記アミン化合物又はアンモニアが酸と反応してなるアンモニウム塩からなる群から選択される１種以上の含窒素化合物と、シュウ酸、ヒドラジン及び下記一般式（５）で表される化合物からなる群から選択される１種以上の還元剤と、下記一般式（２）で表されるアセチレンアルコール類と、が配合されてなり、Ｌ＊ａ＊ｂ＊表色系におけるｂ＊の値が−０．６０〜−０．１０である、銀インク組成物。Ｈ−Ｃ（＝Ｏ）−Ｒ２１・・・・（５）【選択図】なし