Relationship between Surface Abrasion Wear and Brightness in Glazed Porcelainized Stoneware Tiles

Table 3

Fraction of the worn area (𝑓_ad) of the tested samples.

Composition	Fraction of the worn area (%)
	λ = 0.25 mm	λ = 0.35 mm	λ = 0.61 mm	λ = 0.68 mm	λ = ∞
	𝑓ac = 23.1%	𝑓ac = 19.8%	𝑓ac=10.9%	𝑓ac=6.1%	𝑓ac=0%
P	—	69±4	—	—	77±6
P10C	—	58±1	—	—
P20C	54 ± 1	44±2	72 ± 5	74 ± 4