Above I put a
C or a
P for both the HW and the TT so one can compare.
The trays and the kits they sell you at the Dentist such as Zoom and Nupro Gold (dentist charges $350.00)
http://www.dentist.net/whiteningtrays.asp And these are only up to 15% active ingredients.. the TT and HW are stronger.
We would make a mint with a michine that does it like someone above said. I could use my spray room in between. Would be awesome. Where to get such a thing and how much? Or should we just settle fo the TT and HW?