I was looking at some old nicely postmarked stamps under a magnifier and once again noticed a decided 3D effect - the postmark seems to be floating above the rest of the stamp. What is the scientific explanation for this
1. The type of ink used in the cancel 2. The amount of ink in that strike 3. The consistency of the cancel ink 4. The greater the contrast between the cancel color and the host stamp's color, the greater this effect.
I've noticed this myself. I think it is the paper has some fibers that stick up and the ink from the postmark is floating off the paper by a minute amount. The quality of some stamp paper varied. It is a real phenomenon.
Now that I see an example I've noticed this before . Alot of the cancel ink seemed to be really oily based which usually soaked in quite well . Almost wonder if temperature let the cancel ink stay less liquid and float until dried thus leaving it suspended in animation.
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Posted 11/16/2012 11:26 pm
