| 摘要 |
A print assembly for viewing both by reflected and transmitted light consisting of a first image being a photographic or printed color reproduction having the appearance of an image of normal density and color for viewing by reflected light and an identical second image arranged behind and in exact register with the first but being underexposed or of lesser density in relation to the first. Where a photographic process is used the images may be formed on the front and rear of a single transparent substrate.
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