Quote:
Originally Posted by teetwoohsix
Hi Steve-
Kevin did respond about the card in that thread, but not about a black light or a loupe..,I didn't word that quite right  I should of said " and of anyone I could think of who would know how to get around those things, I would think it would be him" or something to that effect 
I did read your post and it is a good theory, but it's like much of the mysteries of T206....we can try to make sense of things, but proving it is difficult,if not impossible. I tried for months to come up with some kind of proof (a theory I had) that the fronts of the cards were printed at the ALC and sent to the factories to have the backs printed on them "at the factories" but could not find anything to solidify my theory....I almost started a thread about it, I was pretty convinced that the 150 series had both front and back printed at the ALC but maybe the 350 and 460 series were shipped to the factories to have them print the backs (one color ink, one pass-as opposed to a six step process). After running this by a few people, I realized my theory wasn't right * although I still wonder  *
Thanks for your response, I always enjoy your posts, very informative about printing processes-I learn alot from your posts.
Sincerely, Clayton |
Ah, that makes sense now.
It should be possible to add a UV blocker to get around the blacklight, but all the ones I know of would be very obvious.
And it's so true that a lot of the details about T206 or nearly every card set of the era will probably remain unproven. Unless someone turns up some paperwork from ALC or from ATC we can't know what was made when or in what quantity.
There's a lot of stuff I could pin down if I had access to some real science equipment. Like what the exact makeup of the black old mill ink was. Most black inks can't turn blue. Carbon particles in a hardener won't ever fade or turn, Iron gall ink fades brown, but not Brown OM brown and it wasn't used in lithography since it's not oil based. Some dyes can change. I vaguely recall making some stuff with my chemistry set that could be changed. But I've never seen it used anywhere and I'm not sure if it changed both ways or just from blue to black. (I seem to remember it changing both ways depending on what was added, but it was over 40 years ago)
And I'm constantly learning things that change things slightly. Like recently I found out that one particular printing of Stamps from New Zealand can be identified from another nearly identical one by the reaction of the paper to blacklight. One shows green, the other doesn't. And that printing was pre 1900. So some old papers do react, which I never knew.
Steve B
Steve B