Color "error" variations in t206 cards

[MuddyMules]

Originally Posted by t206hound

Red on the cards isn't always just red... sometimes red is layered on top of orange (combination of pink/buff and yellow). See the McGinnity's in this auction (I was the consignor and honestly was hoping for a much higher price). It you notice on the one with the red, on the left side near the face you can see some of the orange. I think in the sunlight theory that the red layer is faded away to reveal the color(s) underneath.

Take a look at the picture I have attached. The halftone dots are all at different angles for each color (Black, Cyan, Magenta and Yellow). Look at both of the McGinnity's with a powerful loupe and see if the magenta dots are running at the same angle on both cards. It is very possible that a yellow negative was shot on a magenta plate for the one on the left. Then it was caught by someone and a new plate was made with the correct negative on the correct plate.

Also, it is possible that the magenta and yellow plates were mislabeled before they went to press or the pressman put the yellow plate on the magenta cylinder and the magenta plate on the yellow cylinder and then caught the mistake and swapped the plates.

[steve B]

Originally Posted by MuddyMules

Take a look at the picture I have attached. The halftone dots are all at different angles for each color (Black, Cyan, Magenta and Yellow). Look at both of the McGinnity's with a powerful loupe and see if the magenta dots are running at the same angle on both cards. It is very possible that a yellow negative was shot on a magenta plate for the one on the left. Then it was caught by someone and a new plate was made with the correct negative on the correct plate.

Also, it is possible that the magenta and yellow plates were mislabeled before they went to press or the pressman put the yellow plate on the magenta cylinder and the magenta plate on the yellow cylinder and then caught the mistake and swapped the plates.

I'm glad you posted that graphic. I hadn't seen it before.

It only applies to the modern CMYK process though.
T206s are a combination of halftone and solid passes, and use many more than 4 colors. Where they're halftones most seem to be screened at the same angle.

Here's a closeup of Schlei, showing black, gray, light blue, dark blue, and pink.
Gray and Black are halftone the others aren't.


Steve B

[The Nasty Nati]

Not to completely change the subject, but in regards to UV harm, do SGC and PSA slabs offer UV protection?