Performance indicators measured results of the pilot project pencil hardness / H ≥H 2H by adhesion / pole ≤1 0 through wear (700g / 500r) / g ≤0.060 0.010 out of through resistance, cm 50 50 by the water resistance ( 7d) does not blister, do not fall off, allowing a slight discoloration 60h unchanged by salt water (3% NaCL, 7 days) does not blister, do not fall off, allowing a slight discoloration seven days no change through resistant sodium hydroxide (10% NaOH , 48H) does not blister, do not fall off, allowing a slight discoloration 48h no change through resistance * (1H2SO4%, 48h) does not blister, do not fall off, allowing a slight discoloration resistance 48h no change by the oil stream is not blistering, no loss, 60h no change by allowing a slight discoloration