| 摘要 |
A composition capable of forming colored complexes with transition metal salts is provided which comprises an aromatic substituted hydrazone carried in an organic cosolvent vehicle. When employed in the art of carbonless paper the aromatic substituted hydrazone and the transition metal salt complex to form yellow colored images. The invention provides means for producing dark, black, neutral images by the reaction of the aromatic substituted hydrazones and conventional dithiooxamide complexing compounds, both carried in an organic cosolvent vehicle, with transition metal salts.
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