Publicity device and freshness indicator for deep-frozen product

摘要

The publicity device and indicator of product freshness comprises an ice block (1) made from frozen water with added salt (sodium chloride), containing a disc (2) carrying a suitable message or logo. The salt content of the block is controlled according to the required thawing duration and temperature, and it can be made in separate sections with different amount of salt for slower or faster thawing. The block is contained in a perforated rigid box or supple pack attached to the frozen product.