| 摘要 |
Photographic assemblages, elements, receiving elements and cover sheets are described employing a single neutralizing-timing layer consisting essentially of a carboxy-ester-lactone polymer having the following recurring units: <IMAGE> wherein R is alkyl having from 1 to about 12 carbon atoms or aralkyl having from 7 to about 12 carbon atoms; R1 and R2 are each independently hydrogen or methyl; x is about 1 to about 15 mole %; and y is about 85 to about 99 mole %.
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