This standard specifies pencils and colored pencils used for general writing, drafting, drawing, etc., and the stylus used for them (hereinafter referred to as stylus for pencils and stylus for colored pencils). However, special colored pencils used for watercolors etc. are excluded.
JIS S 6006:2007 Referenced Document
ISO 5-3:1995 Photography - Density measurements - Part 3: Spectral conditions