Were PIEDMONT 460 factory #42 & UZIT backs printed simultaneously ?

[Abravefan11]

Ted - I too am only discussing the backs of the cards and I believe there are three key points to answering your original question:

"Does this suggest that the UZIT backs and the PIEDMONT 460/42 backs were printed simultaneously ?"

1) I do not believe there are two color variations of Uzit, just differences in the amount of the same color ink applied. The image I included in my post above hopefully illustrated that point.

2) Unlike the Uzit backs, Piedmont 42's were printed with two different color blue inks.

3) A comparison of the Uzit subjects to the light P42's or to the dark P42's show that the two were not printed simultaneously.

You included a lot of great information in your post but I don't believe there are any connections between any of the stated facts that would change the three points I posted above.

I hope that helps.

[White Borders]

Hi Ted,

Maybe I'm not completely understanding the hypothesis. If you think the light Uzits were printed simultaneously with the light P42s, and the dark Uzits were printed simultaneously with the dark P42s, wouldn't you expect them to have the same front/back combos? But from your surveys, I don't believe Uzits and P42s have the same confirmed front/back combos.

Your confirmed Uzits are here: Uzit Confirmed List

Your confirmed P42's are here: P42 Confirmed List

As for whether the light vs dark was caused by truly different colors of blue, or was caused by how much ink was applied, I have no clue by looking at them. One way to objectively determine by scientific methods might be by analyzing the wavelength. I'm not really knowledgeable about this, but with your electronic background you might be. I'm thinking every color reflects at its own unique wavelength in the visible spectrum and absorbs all others when exposed to a white light. So, if the colors are truly different blues, they should reflect different wavelengths. But if the colors are the same blue but differ in how much ink was applied, then I'd think they should reflect the same wavelength but at different amplitude (intensity). Just a thought.

Best Regards,
Craig