I much prefer the diamond film! It costs more, but may well be worth it if you obsesss about such things!
Same razor (Tornblom) first honed on a new sheet of 1um alum oxide lapping film 200x
Then after seeing that dissapointing finish, I went to a new sheet of 1um diamond lapping film 200x
Same razor, same magnification, different film, different results.
What seems to happen, especially when the alum lapping sheets are new, is the particles seem to easily come off the film and form a slurry, leaving those striations you see.
Same razor (Tornblom) first honed on a new sheet of 1um alum oxide lapping film 200x
Then after seeing that dissapointing finish, I went to a new sheet of 1um diamond lapping film 200x
Same razor, same magnification, different film, different results.
What seems to happen, especially when the alum lapping sheets are new, is the particles seem to easily come off the film and form a slurry, leaving those striations you see.