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This page was last edited on 20 November 2024, at 18:43 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Graphite exports peaked in 1899, with export tonnage of 33,411 t (32,883 long tons; 36,829 short tons) (35% of the world's total graphite consumption) accounting for Rs. 2.2 million (or about 22% of Sri Lanka's total foreign exchange earnings).
Bogala Graphite Mine (Sinhala: බොගල ග්රැෆයිට් පතල) is a graphite mine located near the village of Aruggammana in Kegalle District, Sabaragamuwa Province. It is one of the largest graphite mines in Sri Lanka, with commercial mining at this location first commencing in 1847.
Kahatagaha Graphite Mine (Sinhala: කහටගහ මිනිරන් පතල Kahatagaha Miniran Pathala) is a graphite mine located in the village of Kahatagaha in Dodangaslanda in Kurunegala District, North Western Province. It is one of the largest mines in Sri Lanka.
Today, pencils are still a small but significant market for natural graphite. Around 7% of the 1.1 million tonnes produced in 2011 was used to make pencils. [ 62 ] Low-quality amorphous graphite is used and sourced mainly from China.
Two graphite pencils. Both are labelled "HB", but the numeric label differs between "2" and "2 1 ⁄ 2 ". A grading chart ranging from 9B to 9H. Graphite pencils are made of a mixture of clay and graphite and their darkness varies from black to light grey. A higher amount of clay added to the pencil makes it harder, leaving lighter marks.