|Product Name:||Rubber pencil|
|Main Uses:||Studio, School|
|Place of origin:||Ningbo,China|
|Feature:||Lovely cartoons are beautiful and pleasant to the eye|
|Pencil is a kind of pen used for writing and drawing. It has a history of more than 400 years. Among them, pencils for drawing can be divided into three stages: graphite, wooden penholder and capped pencil. In addition, the color of pencil has red-white, black-white, yellow-black stripes.
The hardness mark of pencil lead is usually “H” for hard pencil, “B” for soft pencil, “HB” for soft and moderate pencil, and “F” for pencil with hardness between HB and H.
Arrangement (from soft to hard) 9B, 8B, 7B, 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H, 10H and other hardness grades.
The bigger the number in front of H, the harder the lead core, the lighter the color. The bigger the number in front of B, the softer the lead core, the darker the color. The classification of pencil rods is based on the weight of graphite in the pen core. Among them, H pencil has relatively high hardness, which is suitable for objects with relatively hard or clear interface, such as woodworking lines, field drawing, etc. HB pencil has moderate hardness, which is suitable for writing or outlining under general conditions; B pencil has relatively soft core, which is suitable for drawing, and can also be used for filling and painting some machine-recognizable cards. For example, we often use 2B pencils to fill out answer cards. In addition, there is also a common color pencil rod, that is, people often say that the color pencil, mainly used for drawing.