| 摘要 |
<p>A mufti-layer sealed unit incorporating one or more colored features that can fade in the presence of visible light, comprises two or more sheets that are essentially impermeable to oxygen. A front one of the sheets is transparent, generally rigid in form and incorporates UV-filter, and the sheets are maintained in an essentially parallel and spaced apart relationship to each other by a peripheral spacing-and-sealing .assembly enclosing a sealed chamber within which the colored features are located. The unit includes oxygen-absorbing material positioned to be exposed to said chambers. The colored feature may be a separate display object including oil paintings, water color paintings, pencil drawings, engravings, photographs and printed images. The front sheet is of glass and the oxygen-absorbing material is provided in sheet form. The rear sheet may consist of flexible, mufti-layer barrier film material.</p> |
