A braking band of a disk for a disk brake , said braking band comprising an annular band body arranged around a brake disk rotation axis or rotation axis (X-X); said band body is made of gray cast iron or steel or aluminum or alloys thereof; said braking band comprises at least one braking surface (2a or 2b); wherein, at least one portion of said at least one braking surface (2a or 2b) comprises an activated band body portion for increasing the adhesive capacity of at least one protective surface coating placed on the surface of said activated band body portion , wherein said protective surface coating comprises at least one material with elevated resistance to abrasion, and wherein said activated band body portion is arranged on the surface of said band body so as to form an outermost layer of the braking band with said at least one protective surface coating ; and wherein said activated band body portion comprises a rough profile ; said rough profile comprises at least one groove or channel delimited by at least one pair of projections (10 and/or 11 and/or 12) ; said at least one channel extends along a path, which surrounds, at least partially, said rotation axis (X-X); and wherein said at least one channel has a channel bottom and two opposite channel sides in the cross section, at the longitudinal extension thereof, characterized in that a first channel side forms an acute angle (a1) with said channel bottom , i.e. an angle (a1) smaller than 90 DEG; a second channel side forms an obtuse angle (a2) with said channel side , i.e. an angle (a2) larger than 90 DEG; and wherein said at least one pair of projections (10 and/or 11 and/or 12) has a width which is substantially identical to the width of said channel . said band body is made of gray cast iron or steel or aluminum or alloys thereof; said braking band comprises at least one braking surface (2a or 2b); wherein, at least one portion of said at least one braking surface (2a or 2b) comprises an activated band body portion for increasing the adhesive capacity of at least one protective surface coating placed on the surface of said activated band body portion , wherein said protective surface coating comprises at least one material with elevated resistance to abrasion, and wherein said activated band body portion is arranged on the surface of said band body so as to form an outermost layer of the braking band with said at least one protective surface coating ; and wherein said activated band body portion comprises a rough profile ; said rough profile comprises at least one groove or channel delimited by at least one pair of projections (10 and/or 11 and/or 12) ; said at least one channel extends along a path, which surrounds, at least partially, said rotation axis (X-X); and wherein said at least one channel has a channel bottom and two opposite channel sides in the cross section, at the longitudinal extension thereof, characterized in that a first channel side forms an acute angle (a1) with said channel bottom , i.e. an angle (a1) smaller than 90 DEG; a second channel side forms an obtuse angle (a2) with said channel side , i.e. an angle (a2) larger than 90 DEG; and wherein said at least one pair of projections (10 and/or 11 and/or 12) has a width which is substantially identical to the width of said channel . <EOS>