| 摘要 |
FIELD: labelling. ^ SUBSTANCE: labeling method includes a label application onto a package or product surface, with the label containing a pre-applied latent warning information and/or caution notice. The latter are applied using photographic emulsion for subsequent photographic emulsion contact with developer on the label surface to provide complete development of the latent warning information and/or caution notice in accordance with product storage life. ^ EFFECT: opportunity of visual monitoring of product expiry dates without opening the packages. ^ 5 cl |
