Re: ATM Toothpaste

["Joseph O'Neil" <joneil@multiboard.com>]

>I'm currently in the process of smoothing my float-glass mirror, and the 
>finest grit i have is SiC #1200 (i.e. 25 micron). So i thought to give it 
>a try with the acclaimed superior Colgate Sensational Whitening toothpaste.

-snip-

         Ah, maybe not a good idea - according to my dentist of all 
people.   I never knew this, but apparently a lot of different toothpastes 
are actually surpizingly gritty, even the ones you buy for your kids.  But 
apparently the worst offenders of all are all the new "whitening" toothpastes.
         In order to get your teeth that 'super white", many of these 
toothpastes are very abrasive, and really can do a number on yoru tooth 
enamel.
         I am not sure exactly what the actual designation would be in 
terms of a number, but from what I understand, some of these toothpastes 
would actually be closer to a very fine grit than a polish.  For example - 
and this is just for sake of argument - your average whitening toothpaste 
might be closser to say an 800 grit, or the point I am trying to make, even 
coarser than your #1200 grit listed above.
         You know, as a weird and crazy experiment at a starparty this 
summer, it might be fun to have a workshop setup wherein different brands 
of toothpastes are tested against glass to measure thier grit rating and 
suitability for grinding.  Who knows, we just might find a replacement for 
#500 grit at the local drug store!
:)
joe


PS - try Pearl Drops Tooth Polish if you are in the mood.  It comes already 
semi-liquid and is reputed to be one of the most gritty of all.


http://www.oneilphoto.on.ca
http://www.multiboard.com/~joneil