During the production of pencil leads, ground graphite is first mixed with clay and water to make a dough., Once this dough is ready, it is passed through a forming press and emerges as a long thin graphite rod., This rod is then cut into pencil-length pieces, which are allowed to dry., After drying, the leads are placed in an oven and heated to a temperature of 800 degrees Celsius., Meanwhile, the pencil cases are prepared. Wood is sawn into wide slats and a number of grooves are cut lengthwise into each one., Next, a layer of glue is applied and a pencil lead is placed in each groove., Another slat is then placed on top, making a sandwich., Finally, the slats are cut into individual pencils, before being sent through a shaping machine to create a smooth finish..

Process Diagram Label

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