History of pencils
Background of the core improvement
The discovery of graphite chunks made a huge sensation in European society, which was struggling to write drawings and letters at the time, and was hit explosively. The price was soaring, and the lump of graphite became a valuable product. After that, the war began in Britain and the France, and the France that the high-quality graphite which can be taken only in Britain was not able to be obtained was invented the method of the country, and baking by mixing graphite powder and clay as substitutes.