It was the first time in 1770 that the siren was used for a very wide range of applications. That year, in London, a book titled “Familiar Introduction to the Theory and Practice of Perspective” was published. Joseph Priestley, the author of the book, said: “I have seen an object since this book was published. With that, he could easily remove the traces of pencil on a piece of paper. For this reason, it is undoubtedly an extremely useful tool for people dealing with drawing.
This wonderful tool is sold by Mr. Nairne, who makes mathematical tools. Mr. Nairne sells a 2.5-centimeter cubic piece for three shillings, but says it can be used for years. ”
In ancient times, it is known that white bread was used to wipe traces of graphite and black coal pens. Today some charcoal artists still use this effect. Modern development has become this way. The 1752 edition of the French Academy is said to have been spoken blindly. These records mention a herbal blot derived from South American trees called caoutchouch , which is used to delete pen writings. In 1770, the British engineer Edward Nairne sold the first rubber-eraser half-inch-cubicle 3 shilling using rubber instead of bread pieces. When Nairne brought the rubber parts together, the coincidence found their erasing power and formed the product. So, in English, rubber rubber is sometimes used directly instead of eraser eraser. In 1839, Charles Goodyear’s exploration of volcanic rubber was the main progress on the eraser, as well as many other issues. Thus, the use of more durable and durable ergonomics is increased. The first lead pencil and eraser was taken by Hymen Lipman on 30 March 1858 in New York. This patent was purchased by Eberhard Faber by Joseph Reckendorfer in 1862. In 1875, the Supreme Court of the United States accepted the pantheon as invalid because it was not new.
Eraser ; made of rubber, vinyl, plastic or cloth used in the writing of marks, chalk or typewritten signs. Today, fragrance is a combination of vegetable oil, fine pumice and sulfur-bonded rubber. This mixture is processed in rubber processing equipment, hardened by passing through the mold. Vinyl is also a widely used material. Share Information Multiple