This standard stipulates the maximum allowable content of lead in the paint layer of pencils to protect the health of children and adolescents. This standard applies to various types of pencils used by middle and primary school students in my country and pencils produced by the pen industry for export.
GB 8771-1988 history
2007GB 8771-2007 Maximum limits for soluble elements content of pencil coating
1988GB 8771-1988 Hygienic standard for lead content of pencil coating