I've always used Scotch white plastic tape as it leaves virtually no residue, is easy to write on & easy to see. However, it seems to be getting hard to find out here. What do you use?
I don't like electrical tape or any kind of paper tape for console labels. My hands sweat when I work and the ink smears something fierce with those shiny surface tapes.
I use 1" white gaffer tape. It doesn't leave any residue unless you bake it for a month, and it smears much less. If I was going to do labels that had to survive for a long time I might use printed Avery labels on top of e-tape or gaff, with clear Scotch tape over them for protection.
Mac