All specimens were polished with SiC sand paper (1500 grit), washed with anhydrous ethanol for 30 minutes in an ultrasonic cleaner, and then rinsed with deionized water prior to use.
As explained for aging t-shirts, worn areas can be made by using sand paper (100 grit or heavier) along the butt, other knee, sides or near the pockets of many fabrics.
Those numbers represent the size and density of sand/glass grains on the surface of the paper, 50 grit being harsh and 220 grit being very fine.
Comparison results are presented concerning surface after abrasive polishing (using the paper of grit size up to 1000) MP, standard electropolishing EP, and magnetoelectropolishing MEP.
After the plumes of dust whip by and the mechanical brooms maneuver loudly past, a glance at the curb line often reveals debris, paper and grit that the sweeper failed to collect — much to the frustration of car-moving residents and, indeed, any of us who suffer through these malodorous days of summer.
Then, to provide a smooth surface, they were manually sanded with emery paper 220 grit.
The Cu plates (0.3× 1× 1 cm) were polished with emery paper (2000 grit), rinsed in distilled water and ultrasound in acetone to remove oily stains.
A region larger than the bonding area was wet abraded using silicon carbide paper (220 320 grit size) with a conditioner (M-Prep Conditioner A) and dried using gauze sponge.
I then ran the belt sander twice more, with 60-grit paper and 100-grit paper, and finished by using a hand sander to blend the seams between the drum sander and the orbit.
For the pretreatment of steel surfaces three kinds of grinding papers were used, in all cases waterproof silicon carbide papers with grit sizes of 80, 320 and 800 mesh, from Hermes Schleifmittel GmbH & Co. KG or from Struers GmbH respectively.
