| 摘要 |
<p>A physical developer composition for latent images comprises a mixture of at least one copper salt and at least one nickel salt and a reducing agent for copper and nickel salts wherein the nickel and copper salts are in such proportions that upon reduction to a metal alloy, the alloy contains from 9 to 98 mole percent copper and from 2 to 91 mole percent nickel.</p> |
