Most pencil cores are made of graphite mixed with a clay binder which leaves grey or black marks that can be easily erased. Graphite pencils are used for both writing and drawing and result in durable markings: though writing is easily removable with an eraser, it is otherwise resistant to moisture, most chemicals, ultraviolet radiation, and natural aging. Other types of pencil core are less widely used, such as charcoal pencils, which are mainly used by artists for drawing and sketching. www.entrepreneurindia.co Coloured pencils are sometimes used by teachers or editors to correct submitted texts, but are typically regarded as art supplies, especially those with waxy core binders that tend to smear on paper instead of erasing. Grease pencils have a softer, crayon-like waxy core that can leave marks on smooth surfaces such as glass or porcelain.Market Outlook The market for writing instruments in India is estimated at 1600 to 2400 million pieces a year. The total market for writing instruments is estimated at Rs 22 billion in value and is growing at around 8 to 10% annually. There is a growing demand of polymer pencil in the market. The products find application in schools, colleges, government offices, commercial establishments, NGOs and miscellaneous ac www.entrepreneurindia.co According to the type of carbon used, pencils are classified as soft, medium and hard. There is no doubt about the acceptability of the product and lead pencils still command a respectful demand. The product has a good export potential also.