> My microscopy has been as a hobby. Maybe things have changed, but when I
> bought a box of "pre-cleaned" microscope slides, they were filthy! I would
> have to wash and dry them. I presume that truly clean slides can be
> purchased. Was I just paying too little?
>> Bill
Basically what it means it that they cleaned the glass before they cut
it.
The dirt is leftover from cutting and grounding the edges. In the bad
old days you (could) had grease on them.
R.