Variable color food wrapping paper

A food wrapping paper and color-changing technology, which is applied in wrapping paper, wrapping paper, packaging, etc., can solve the problems of small packaging bags, unsafe packaging bags, blurred production date fonts, etc.

Inactive Publication Date: 2009-12-30
SHANGHAI YANGPU DISTRICT KONGJIANG ERCUN PRIMARY SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, many foods have packaging bags, but because the production date on the packaging bag is very small, people often eat it directly without paying attention to whether it is expired; or the production date on some packaging bags is blurred and cannot be seen clearly, which is very unsafe

Method used

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  • Variable color food wrapping paper

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0008] see figure 1 A color-changing food wrapping paper includes a food wrapping paper 1 and a layer of chemical substances 2 that are prone to oxidative discoloration. The chemical substance 2 is coated on the surface of the food wrapping paper 1, and the chemical substance 2 will be oxidized in the air. As time goes by, the chemical substance 2 on the surface of the food wrapping paper 1 will change color due to oxidation. The color of the food can tell whether the food has expired.

[0009] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and that described in the above-mentioned embodiments and the description only illustrates the principles of the pr...

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Abstract

The invention relates to variable color food wrapping paper, which comprises food wrapping paper. The variable color food wrapping paper is characterized by also comprising a layer of chemical substance susceptible to oxidizing discoloration. The chemical substance is applied to the surface of the food wrapping paper and can be oxidized in the air. The chemical substance on the surface of the food wrapping paper can discolor because of oxidization over time, so that people can know whether food is expired by distinguishing the color of the food wrapping paper.

Description

technical field [0001] The invention relates to a color-changing food wrapping paper. Background technique [0002] At present, many foods have packaging bags, but because the production date on the packaging bag is very small, people often eat it directly without paying attention to whether it is expired; or the production date on some packaging bags is blurred and cannot be seen clearly, which is very unsafe . It was therefore important to invent a wrapping paper that would change in color over time. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a color-changing food wrapping paper. By using the color-changing food wrapping paper, it can be clearly found whether the food has expired. [0004] The technical problem to be solved by the present invention can be realized by the following technical solutions: [0005] A variable color food packaging paper, including food packaging paper, is characterized in tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10B65D65/38B65D30/02
Inventor 李思仪
Owner SHANGHAI YANGPU DISTRICT KONGJIANG ERCUN PRIMARY SCHOOL
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