Specifies the characteristics of wood-cased graphite lead pencils (of 14 hardness degrees) and wood-cased coloured lead pencils for general writing, drafting and drawing purposes. Also specifies the characteristics of wood-cased graphite lead and coloure
SANS 1531:2003 history
2003SANS 1531:2003 Wood-cased pencils and extruded plastics pencils, with graphite lead and coloured lead