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In today's digest experiences from
4-й Book «Simple Science". They are useful versatile parents loved grandparents, uncles and aunts cool. I have a nice
spend time with children !
Chemical eraser ink h4>
Wash the ink from the paper can also be just a little soak the paper itself and, after drying, still show traces of moisture. However, the ink will disappear.
Sinking and netonuschy orange h4>
All the matter in the porous structure of the rind.
Xerox gelatin h4>
As a child, my father was showing how to use the boiled eggs can be transferred to an ink inscription. But with gelatin, and certainly more fun.