Aug 1, 2023 «Invisible Ink» By odb-abai inNews On August 1, as part of the Day of Interesting Facts, the Invisible Ink experience was presented to the attention of children. During the experiment, having created a secret message using cotton swabs, milk, lemon juice, rice water, iodine solution, the children were shown how to read it using an electric iron. The experience interested the children, at the end of the lesson they were recommended books that reveal the content of various scientific experiments.