The National Library of Australia found chocolate before 120. It has a history of 120 years and can be regarded as one of the oldest chocolates in history. But when the researchers opened its wrapping paper, the chocolate still smelled interesting. Then why is this chocolate so well preserved? We can obviously guess that a large part of the reason is that he refuses to contact the air.

We all know that chocolate is made of chocolate beans, and the best way to preserve an object is to isolate it so that it does not react directly with air. There are some air-isolated packages around, and relevant personnel introduce them, as well as silver foil. This material will not react completely in the air, so it can protect articles well. Then we can know that the reason why this chocolate can be preserved here for such a long time is largely because its outer packaging is made of straw, and the research of relevant personnel shows that it belongs to the gift given by the queen of the local country to praise the soldiers during the Boer War, because the box on the surface of the chocolate is printed with obvious words of war, such as Happy New Year to you.

But to the surprise of the researchers in the library, because he kept the integrity of the goods, the chocolate basically kept its original appearance after opening, with only a little burden, and it looked delicious and made people want to eat. Related experiments, that is, the researcher showed that these chocolate boxes were specially prepared for the army at that time, but he didn't expect them to become the best-selling goods in the front line.

The reason why it can be found in the Australian Library is that in 1899, British soldiers bought this chocolate box from the local war fighter's office, brought it back to him after passing through the outside line in Qian Fan, and put it in this library. It can be said that this kind of chocolate has strong collection value and research value.