JPH08338837A - Method and material for checking freshness of food - Google Patents

Abstract

PURPOSE: To readily check freshness of a raw egg or a fruit housed in a container. CONSTITUTION: A leaf of a natural tree such as hinoki, matsu, sugi or maple tree of which color changes day by day or a material which is not harmless to a food such as Mn, vinegar, or alcohols that is easily oxidized in the open air and changes in a comparatively short time is housed in a transparent container 2 or a mesh type container in the vicinity of the food housed therein by being disposed on a portion easily observed from the outside thereof so that it is possible to check the freshness of the housed food by the color change of the material harmless to the food of which color changes with the lapse of time. The change of the color or the other characteristic of a freshness- convincing material 1 is observed by unit of day or time so that it is possible to know the deterioration of the housed food due to the lapse of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is made of transparent plastic,
Checking the freshness of foods such as raw eggs and fruits stored in net containers.

[0002]

2. Description of the Related Art Conventionally, the freshness of raw eggs and fruits has been confirmed by the appearance of the stored food, the date and time label attached to the outside of the container, and the like.

In recent years, due to the progress of the distribution system, highly fresh foods directly delivered from the production area have come into circulation. In this case, freshness is required in units of hours and days. In that case, confirmation of freshness must rely on the credibility of the seller and experience, and particularly in the case of raw eggs, confirmation of freshness from the outside of the container is almost impossible.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide means for easily confirming the freshness of raw eggs and fruits stored in a container.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a substance which is harmless to food and discolors in a relatively short time in the vicinity of the food stored in a transparent container for storing food, a net container, and , Place it in a place that is easy to see from the outside of the storage means,
It is a method of confirming the freshness of stored food with time by the color change of a substance that is harmless to the food and changes color over time.

In this case, a substance which is harmless to food and discolors in a relatively short time is discolored on a daily basis, such as cypress, pine, cedar, and maple, and a small piece of leaf of a natural tree whose state changes. Just by placing the above on the raw eggs and fruits in the container, it is possible to know the elapsed time from the time of storage depending on the degree of discoloration and discoloration of the placed natural tree leaves. In addition, such natural leaves, especially cypress, have a bactericidal action and a deodorizing action on stored items such as raw eggs and fruits.
It can be preferably used.

Further, as a substance which is harmless to foods and discolors in a relatively short time of day or hour, it can be easily replaced with Mn, vinegar and alcohols instead of such natural tree leaves. Substances that oxidize and discolor in the atmosphere
It can be used as it is or by allowing the solution to soak into a non-cotton sheet material. Further, it can be used as a mixture with plant sap.

[0008]

By checking the change in the color and other characteristics of the freshness checking material on a daily or hourly basis, it is possible to know the decrease in freshness of the stored items over time.

[0009]

EXAMPLE As an example of the present invention, an example using a natural cypress leaf as a freshness confirmation material for confirming the freshness of a raw egg will be described.

Usually, it is said that the number of days that the freshness of the ground eggs collected by farmers can be maintained is 2 to 3 days, and hinoki leaves were selected as a freshness confirmation material that does not discolor until the number of days has passed.

As shown in FIG. 1, a cypress leaf that has just been cut from a natural tree is 10 to 15 cm from the tip of the leaf so that the freshness of the cypress leaves can be easily confirmed without disturbing the confirmation of the stored eggs. The freshness confirmation material 1 was obtained by cutting into a length of about 1. Reference numeral 2 shows a transparent simple container for storing an ordinary egg. Five transparent eggs 3 were stored in this transparent simple container 2, and a cypress leaf was placed thereon as a freshness confirmation material 1 and the lid 4 was closed. Two days later, the leaves of the cypress leaves inside the container were slightly withered at their edges and discolored. The two days at the time of this discoloration were just the limit period when the commercial value of the freshness of the collected ground eggs could be maintained. In this way, if the time of collecting eggs and the time of cutting off the leaves of the hinoki are placed, it is possible to know the discoloration of the leaves of this hinoki or the deterioration of the freshness of the stored eggs due to the time elapsed. You can

[0012]

According to the present invention, the following effects can be obtained.

(1) The freshness of the stored food can be easily confirmed without special processing of the storage container.

(2) The confirmation does not require any skill and can be confirmed by a general housewife.

(3) What was confirmed to be fresh at the time of eating becomes possible at the time of purchase.

(4) Anyone can confirm it, which is useful for product management during transportation.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Freshness confirmation material 2 Transparent simple container 3 Egg 4 Container lid

Claims (6)

[Claims] 1. A place where a substance that is harmless to food and discolors in a relatively short time can be easily confirmed in the vicinity of the stored food in the storage means storing the food and from the outside of the storage means. A method of confirming the freshness of the stored food by discoloring a substance that is harmless to the food and discolors over time. 2. The method for confirming the freshness of stored food according to claim 1, wherein the substance that is harmless to food and discolors in a relatively short time is natural leaves such as hinoki, pine, cedar and maple. . 3. The freshness of the stored food according to claim 1, wherein the substance that is harmless to food and discolors in a relatively short time is a chemical substance such as Mn that easily oxidizes in the atmosphere. Confirmation method. 4. The method for confirming the freshness of stored food according to claim 1, wherein the storage means for storing food is a transparent container or a net container. 5. The method for confirming the freshness of stored food according to claim 1, wherein the stored food is raw eggs and fruits. 6. A material for confirming the freshness of stored foods, which is made of a sheet material that is harmless to foods and discolors in a relatively short time.