Color-changeable intelligent label for indicating food freshness and preparation method thereof

Abstract

The invention discloses a color-changeable intelligent label for indicating food freshness and a preparation method thereof, which belong to the field of food label detection. The invention discloses a color-changeable intelligent label for indicating food freshness. The color-changeable intelligent label comprises glassine release body paper, environment-friendly coated paper and anadhesive. The environment-friendly coated paper is coated with time-varying printing ink mixed with an oxidized color-changeable substance; and the adhesive is used for bonding the glassine release body paper and the environment-friendly coated paper. The time-varying printing ink is arranged, the printing effect is good, according to the air contact time, an oxidation color-changeable reaction is generated, the label is changed from green to red within 1-5 days, the label can pass FDA verification and is free of pollution to food, the coated high-viscosity acrylic environment-friendly water glue has the ultrahigh viscosity effect and excellent attaching performance, the label is attached to a food package, the color and freshness reference index of the label can be changed due to time change, consumers can know the freshness condition of food as long as they pay attention to the color of the label, and observation is more visual.

Description

technical field [0001] The invention relates to the technical field of food labels, in particular to a color-changing intelligent label indicating food freshness and a preparation method thereof. Background technique [0002] Food labels refer to the words, graphics, symbols, and all descriptions on prepackaged food containers; [0003] With the continuous improvement of consumers' food safety awareness, food labels have become the focus of their attention. Through labels, we can learn about food information. When buying food, we often rely on the expiry date on the food package to grasp the freshness of the food; [0004] Especially for bread, fruits, vegetables, or foods that are not easy to observe internal rot, the freshness is particularly important. Usually, it is judged by observing the production date and shelf life of the food, which is not easy to observe the freshness. Contents of the invention [0005] The purpose of the present invention is to solve the probl...