Different types of pencils are used differently

At present, the pencil refills on the market use graphite as the main raw material. The hardness mark of graphite refills generally refers to a hard pencil with "H", a soft pencil with "B", a pencil with moderate hardness for "HB", and a pencil with hardness between HB and H for "F". . According to the hardness of the refill, the graphite pencil is divided into 6 kinds of 6B, 5B, 4B, 3B, 2B, HB, F, F, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H, 10H, in front of the letter The larger the number, the harder or softer it is. In addition, there are 7B, 8B, 9B soft pencils to meet the special needs of painting. Faced with a wide variety of pencils, many consumers are hard to decide when choosing.

In this regard, a person in charge of the Shandong Longkou Yiyou Pencil Factory, which specializes in pencil export, said that the pencils used by students to write homework on a daily basis are mostly H-based, and the examinations are all based on “2B”. If it is not for special purposes, it is just for general work, and it can be used with H. Other types of pencils are used for drawing or drawing.

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