During the 1920's bread companies issued several sets of cards printed on thin paper that had preprinted invisible coloring and you would just use a wet brush to bring out the colors as if by magic.

Most of the sets had 50 different pictures (that's a lot of bread!). Here are a few examples from some of the series:

Magic Flying Trip (the set is numbered):

(color activated)



(non-activated)




Wonder Spots of the World (unnumbered):




Invisible Color Pictures (numbered):




Invisible Color Cut-outs (numbered):




And my favorite....

Magic Cards of Knowledge (numbered):

Hey Todd,

It it just my computer, or are these images not showing up? I even tried smearing the wet brush across the screen, and still happened (except a few sparks and smoke rolled out from behind my monitor). Oh, I get it, they're INVISIBLE magic cards!

But seriously, I can't get it to show or Safari OR the AOL browser.

Also not visible in MS Internet Explorer. Note the button says "linked image."

HA HA Guys! That's because my webserver is down. I hope it will be back up soon.

It's back up now and they are beautiful!