So yesterday I put a small ring of white Corian in a red dye. It is slightly pink but the dye as has been suggested is only into the fine sanding scratches. At the end of the day I put a small piece of 1/2 think white Corian in the same dye and today I removed it and cut it in half revealing that no dye actually penetrated the Corian. Sure there is some surface colouring but that's it. Just verifying in my own way what all the experts here have already told us.
Pete
* It's better to be a lion for a day than a sheep for life - Sister Elizabeth Kenny *
I think this equates nicely to wood turning as well . . . . .