| abstract |
A reproduction is obtained by applying a heat pattern to a recording material containing a generally non-light sensitive silver compound which is susceptible to chemical reduction to release silver metal therefrom, while the silver compound is in reactive contact with a 1,2-dihydro-2,2,4-trialkylquinoline reducing agent. The heat effects the reduction reaction in the heated areas releasing silver metal to give a visible indication in the heated areas. |