Table 4 Surface preparation of coupons performed by the institutions participating in the interlaboratory comparison of the 3-in-1 Oddy test
From: Review and interlaboratory comparison of the Oddy test methodology
Participants | Coupon preparation | Additional preparation | |
|---|---|---|---|
Sandpaper | Micromesh pad | ||
I | P600 grit | – | A hole of 2 mm in diameter was made in each coupon at a distance of 5 mm from one edge to be hung from glass hooks |
II | P600 grit | – | – |
*III | Bristle brushes | A hole is drilled in each coupon and marked with an F (front) inscribed to the right or left of the hole. The hole is used to knot each coupon to an inert wire from which they hang | |
IV | – | 1500 grit | – |
V | P600 grit | – | Each coupon was labelled with numbers by incision with a scalpel on the edge to be pushed in the stopper |
VI | – | 1500 grit | – |
VII | – | 1800 grit | – |