Characteristic

Requirement

Thickness of the element, t

△t average  ≤ 0.50mm, relative to nominal value
t max－t min≤ 0.50mm

Length of the surface layer, l

For the nominal values given, no measured value shall exceed:
l ≤ 1500mm       △l ≤0.5mm
l ＞1500m        △l ≤0.3mm/m

Width of the surface layer, w

△W average ≤0.10mm,relative to nominal value
W max －W min ≤0.20mm

Length and width of squared elements, l﹦w

△l average ≤0.10mm,relative to the nominal value
△W average ≤0.10mm,relative to the nominal value
l max －l min ≤0.20mm
W max －W min ≤0.20mm

Squareness  of the element, q

q max ≤ 0.20mm

Straightness of the surface layer, s

s max ≤0.30mm/m

Flatness of the element, f

Maximum single values:
f w, concave  ≤0.15％    f w , convex ≤0.20%

f l, concave ≤0.50%      fl, convex ≤1.00%

Openings between elements, o

O average ≤0.15mm  o max ≤0.20mm

Height difference between elements, h

h average ≤0.10mm   hmax ≤0.15mm

Dimensional variations after changes in relative humidity, δl, δw

δlaverage ≤0.9mm
δw average ≤0.9mm

Light fastness

Blue wool scale, part B02,not worse than 6
Grey scale, part A02,not worse than 4

Static indentation

No visible change, i, e. ≤0.01mm indentation
Using a straight steel cylinder,Ф=11.30mm

Surface soundness

≥1.00 N/mm2