Quote:
Originally Posted by ballaratdragons
Just to set your mind at rest, Demineralised water is Distilled water.
They 'de-mineralise' it by 'distilling' it.  |
Not necessarily true actually. Demineralised/deionised water, in the lab setting at least, is created by passing the water through an ion exchange column and a .44 micron filter. This gets rid of 'minerals' and does a pretty good job of cleaning it up. However, it can and does leave non-polar impurities if they are present, e.g. some organic compounds.
On the other hand distillation doesn't get rid of anything with a boiling point below 100C (unless it's been distilled very carefully).
As far as cleaning your mirror there is unlikely to be much difference though!
PS Apologies for my pedantry!