ALTANA Byko-Cut Universal Manual - Manual (Page 15)

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English 6.2.3 How to do the measurement for film thickness
Step 1: Marking
Make a perpendicular mark to the scratch direction
with a black marker on the panel
Step 2: Cutting
Select the cutter based on predicted film thickness
and make a vertical cut.
Step 3: Adjustment of microscope
• Place the microscope of the byko-cut Universal
over the cut
• Adjust the top lens for focusing the scale
• Adjust the lower lens for focusing the surface
Step 4: Result
Count the line increments and multiply them with
the appropriate factor given in the conversion table.
Determination according to ASTM method uses the
mils scale
The cut is usually frayed. To increase the precision,
measure several parts of the cut and calculate an
average. For best results the individual coating
layers should have a different color.
The following film thickness calculation example is
using cutting tool #3.
a = Substrate
b = E-coat
~ 12 x 2 = 24 µm
c = Primer ~ 20 x 2 = 40 µm
d = Base coat ~ 10 x 2 = 20 µm
e = Black marker
Total Film Build: ~ 48 µm
Operation