PRODUCTS HISTORY
Lead pencils, of course, contain no lead. The writing medium is graphite, a form of carbon. Writing instruments made from sticks cut from high quality natural graphite mined at Cumberland in England and wrapped in string or inserted in wooden tubes came into use around 1560. [1] The term "black lead pencil" was in use by 1565. By 1662, pencils were produced in Nuremberg, in what is now Germany, apparently by gluing sticks of graphite into cases assembled from two pieces of wood. By the early 18th century, wood-cased pencils that did not require the high quality graphite available only in England were produced in Nuremberg with cores made by mixing graphite, sulfur and various binding agents. These German pencils were inferior to English pencils, which continued to be made with sticks cut from natural graphite into the 1860s. The 1855 catalog of Waterlow & Sons, London, offered "Pure Cumberland Lead Pencils."
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Lapis Pang masa...Karamihan sa mga bata ay walang lapis. kaya naisip ng pencil corporation na ipamigay at ipagbenta sa tulong na makakaya.
ElementaryaBagama't ang mga estudyante sa elementarya gamit ay lapis. subalit sa mga mahihirap na di kayang makabili nang lapis ay pwede na lamang sa kanila ay ang pudpud na lapis at yun ay di na sila makakapasok sa eskwelahan.
CorporationThis corporation conclude for one single pencil policy. various materials like this product have chemical that warn to the children like the lead of pensil on the bottom of this like what said.