The total craziness to be found in modern cards.

[steve B]

Originally Posted by ALR-bishop

Steve---I have done the light and dark back logos....what is the reactive ink ?

I collect all Topps sets and many, if not all variations listed in the catalogs and beyond . The 1991 set has more variations, errors and oddities than any other Topps set from my standpoint

If you look at the backs with a blacklight some will glow bright orange, others won't glow at all. They seem to be roughly equal in quantity.

A few will look a very dark red. Hard to tell from the regular ones, and the light needs to have fresh batteries.

I've also found a very few where the cardboard glows slightly, and one or two that the gloss glows slightly green.

Yeah, 91 is one complicated set.
(I've also found partial wrongbacks, players with managers backgrounds and the other way around.)

Steve B