I hope you don't think I'm picking on your card Harrison because I'm
not I just think potential buyers should know the facts about some
of the "missing color" cards.
Some of them were cataloged and graded before there was evidence
that most of these are post production fading and I think some sellers
know this and are taking advantage of buyers.
It's up to the buyer to decide but I think they should know about
the possibility that it might just be faded instead of missing color.
Personally I wouldn't pay a premium for any of them even one
with a clean back.
Here's a card that a member soaked and there is no way that anyone
could tell from a scan that it was soaked.
Chris B Soak.jpg
I think it's a combination of certain types of adhesives and some other factor
like sunlight or heat that causes the fading.
Adhesives can have an effect on all types of materials. If your installing
black or green marble your supposed to use an epoxy to set them instead
of a thin set mortar or ceramic tile adhesive. The reason for this is both the
thin set and tile adhesive are water base and if you use them to install the
marble it can cause the marble to warp and turn the corners up.
Adhesive has a different effect on white marble. You have to use a white
thin set instead of grey or ceramic tile adhesive if you use either of those
two the trowel notches show through the front of the marble.