| 摘要 |
A translucent container (1) has an image bearing portion (3) located on a part of the container, the image being in a visually unreadable (incoherent) form, and a viewing window (4, 5) is located on an opposing part of the container for rendering the image in a visually readable (coherent) form when the contents of the container do not obscure the image. The image and windows may be formed on a label or may be formed directly onto the container by, for example, printing. Numerous methods are disclosed for rendering the image incoherent and for enabling the image to be rendered coherent. |
