tail end roughness Ra values of the first coil on new
work rolls.
As Wa is a function of texturing process and also
proportional to Ra, a lower roll Ra has been
previously found to produce a lower rolled sheet
waviness, which is significant for paint appearance.
The improved transfer rate is possibly due to a
combination on the work roll surfaces, textured with
PDTTM, of positive skew and a greater uniformity of
the peaks.
Figure 7: PDTTM Rpc Transfer
Figure 8: