Then take 7-inch lengths pencil filling paste into each slit stuffed with this pencil, the owner retains the owner flag in the 1980s, clay and water in small dipping in the wax to add strength and durable.
The pencil lead length 7 inches down in each groove. The pencil lead is made of granite. Clay and a little water. Dipped in wax to increase the strength ทนทา).