Egg-citing Wonders

In Ceramics, a girl brought in a half boiled egg. However, it was interesting how it hadn't rotted or molded after a week! She claimed she had sprayed it with a coat of a secret ingredient. This amazed me and made me wonder what could possibly stop the rotting of the egg. Passing it around, she explained that the egg was neither too soft nor too hard. We felt it ourselves in a plastic bag and she proved to be right. Unfortunately she refused to reveal her secret and left us curious. An egg-cellent class to end the day!