Canada #1098 With Missing Colour

I have never paid much attention to this area of philately, so after finding this little gem in a friend's collection, I have been poking around for some info.




There was a good article in Linn's about how to assess whether a missing colour was actually a printing error or some later alteration of the stamp. This one looks pretty solid - the Yellow in the CMYK process was never laid down. (Here's the Linn's article : https://www.linns.com/news/us-stamp...-colors.html )

Is this a listed variety in Unitrade? How would I go about evaluating it?

Here's what it is supposed to look like..




Any help/advice appreciated!

Do NOT send it to me, unless I personally request it.

(Robert: please do not tell people to send me their stamps!, and please remove that note in your previous response.)

If you really think the yellow is completely missing, send it to the Greene Foundation for expertizing. They have the necessary equipment to verify it. There is a cost for this service.

I would suggest first posting a higher resolution scan here (at least 600dpi, or larger) so that we can look at it. Or, look at the stamp with a magnifying glass to see any remnants of the 'yellow'.

I store my used 'hoard' of stamps in boxes. For easy identification, actual stamps are glued to the end of each box. The following image shows the end of a box for the low-value mammal definitives ... this box has been exposed to fluorescent light for the last 30 years. There are no missing colours; just colour changelings due to prolonged exposure to light.

Comparison of correct colours vs. colour changelings:



Robin Harris

Thank you, Robin. Very helpful.

That scan is 600 dpi. I have studied the stamp under high magnification for any remnant of yellow ink - nothing to be found. The other colours are still brilliant - no evidence whatsoever of fading....

I'll check out the Greene Foundation....

Could it be that it is a USED stamp and somehow the stamp got bleached, chemically altered?


Trodent

It is definitely a used stamp; the postmark is clearly visible.

I guess some sort of bleaching is possible, but it would have been very selective - the cyan, magenta, and black ink all seem unaffected, while the Yellow was completely erased.

Has anyone ever seen that happen? Is there some known way to selectively bleach out one colour of ink?

Highly likely that it is a sun-faded (UV) stamp.

Yellow bleaches out pretty easily - see the examples that Unitrade Editor gives. 2c is a good example.

Greene will unlikely certify it as an error due to it being a used stamp. If you sent it in, you would likely get a "no opinion".

Go ahead if you wish though. I don't believe they charge for "no opinion" - postage costs aside.

MichaelPat

I did a quick analysis of your 2 stamps.
As you can see the first stamp is more blue.
The second stamp is more green.


But like 3Dadeo says...I agree..Might just get NO OPINION.

Robert