9B - 8B - 7B - 6B - 5B - 4B - 3B - 2B - B - HB - F - H - 2H - 3H - 4H - 5H - 6H - 7H - 8H - 9H
Softer Harder
NOTE — Pencils made by various manufacturers may be used by agreement between the interested parties, provided they
give similar relative rating results.
Some examples of pencil makes and manufacturers which have been found suitable are as follows:
Microtomic, manufactured by Faber Castell;
Turquoise T-2375, manufactured by Empire Berol, USA;
KOH-I-NOOR, type 1500, manufactured by Hardtmuth AG;
Uni, manufactured by the Mitsubishi Pencil Co.
For comparative testing, it is recommended that pencils from the same manufacturer be used. Variations may be found
between manufacturers and between batches from the same manufacturer.
6.3 Special mechanical sharpener1), which will remove the wood only, leaving the cylindrical pencil lead intact
(see figure 2).
6.4 Abrasive paper, grit No. 400.
6.5 Soft cloth or swab of cotton wool, to clean the panel after the test, using a solvent to which the coating is
inert.