ALTANA Byko-Cut Universal Manual - Manual (Page 18)

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English
6.3.2 Cross-Cut Results
ISO Class: 0 ASTM Class: 5 B The edges of the
cuts are completely smooth, none of the squares of
the lattice is detached.
ISO Class: 1 ASTM Class: 4 B Detachment of
small flakes of the coating at the intersections of the
cuts. A cross-cut area not significantly greater than
5 % is affected.
ISO Class: 2 ASTM Class: 3 B The coating has
flaked along edges and/or at the intersections of
cuts. A cross-cut area significantly greater than 5 %,
but not significantly greater than15 % is affected.
ISO Class: 3 ASTM Class: 2 B The coating has
flaked along the edges of the cuts partly or wholly
in large ribbons, and/or it has flaked partly or wholly
on different parts of the squares. A cross-cut area
significantly greater than 15 %, but not significantly
greater than 35 % is affected.
ISO Class: 4 ASTM Class: 1 B The coating has
flaked along the edges of cuts in large ribbons and/
or some squares have detached partly or wholly. A
cross-cut area significantly greater than 35 %, but
not significantly greater than 65 % is affected.
ISO Class: 5 ASTM Class: 0 B Any degree of
flaking that cannot even be classified by classifi-
cation 4; i.e. an affected area greater than 65 %.
Operation