The snows I got, and I think the guy lived in Illinois, are pink/red eyed albinos with NO black.
Ivories, well I started calling them this back in the 80s when we'd cross coastal and desert blood. The mature individuals looked like old ivory, sort of yellow, though not as bright as a pure coastal and no where near the white of desert calking.
I figure anything that is 80% white is a good high white, just like anything with 80% yellow is a high yellow and 90% or more yellow is a banana. Of course there are some that are closer to 98% yellow that are even better bananas. I see a lot of 50-60% white/yellows as snows/bananas and they just aren't.
I still can't remember the breeders name I got the snows I had from and I gave them to someone else to work with. I'm thinking maybe it was Steve or Peter. I am SO bad with names.