1988 US Carousel Stamp Sheet Printing Error?

I have a 1988 US Carousel stamp sheet that appears to have a printing error. It is missing the yellow color. Someone posted about having a stamp that was missing the yellow color, but it was written off as having been sun bleached. This sheet has some yellow around the edges, and it looks like a printing error. Does anyone have any info on these stamps? Thank you!!!

Photo found here
https://lensdump.com/i/ReyoyF

It looks like your sheet was framed, hung in a well-lit room, and the frame or matting shielded the pane edges from fading-out the yellow.

Wow! what insight
I was thinking a sheet lay on top, giving the result

I thought that too, until I realized the other colors are still vibrant... only the yellow overlay is gone.

On the spectrum, red-orange-yellow-green-blue-indigo-violet (Roy G Biv from science class), the red end of the spectrum sun-fades first, so the majority of pseudo-color-missing errors lack red/orange/yellow. Yours is typical, and if I wanted to replicate it I would frame/mat a pane as I described above. Perhaps others will have differing opinions.

I have a similar block of 20 or 30 also with the margin that appears just like the sheet in discussion. I believe this was caused by an ink starved press. I listed it on ebay many years ago with no bids. I will try and post my sheet in this forum as soon as I can find it.

I found my carousel horses from the ink starved press. The sheet shown in the forum is more starved of the yellow ink than in my examples. The sheet in the forum, is clearly from the ink running low and not from sun or light exposure. I will try and scan my examples today and post them here, but I often have problems with uploading scans. Also the plate number from my example is 222232-1

Great! If there are others out there. Someone had their stamps evaluated and it was determined as "color-challenging". I am going to try and post a picture of the very old thread.

This is a picture of what he had evaluated. I can see that it would be difficult to make a determination with only these 4 stamps.

here is the scan of my block of the carousel horses from 'ink starved press'. They were purchased at the PO and have not been exposed to any sunlight.

As John said, these are color changelings, light exposure damaged. You can replicate the process by placing a sheet in a southern facing window for a few weeks.
https://stampsmarter.org/learning/A...gelings.html
Don

the block I posted has NEVER been exposed to sunlight and was purchased at the post office when the stamp was current. I have a larger block of this same issue. You can place a normal carousel stamp sheet in the sun and for sure this will change the ink over time. That has nothing to do with the examples shown here and in my collection that were from a press running low on the yellow ink. the edge of the printing shows darker. I will stick to the fact that these are from ink starved or low ink printings. Again, these were purchased across the counter in a post office out of the clerks stock and not from a frame hanging on the wall exposing the stamps to sunlight.
Also the example shown on the link from (51Studebaker) above shows a changling from sunlight of the carousel stamp. Note that ALL colors were effected and in my and the originator of this posts example only shows the YELLOW change.

I was responding to the thread's original poster (which is why I mentioned John's post) and images (which is obviously a color changeling).
Don

Edit: The original posters image would in no way be an 'ink starved' printing issue given the sharp edge/transition. I am unsure why introducing your block in this thread is applicable.

If anyone is sure that the original posters stamps are some kind of printing error, then feel free to offer to pay for his certification if it comes back as NOT a printing error. I am willing to pay for his certification if it comes back as a printing error.
Don

I don't consider these 'errors' but freaks from low ink in the yellow. The edge high color may have to do with the printing press. I remember from shop class the old presses would squeeze the ink to the edges of the plate. Just proposing ideas other than "left in the sunlight". The fact is my edges in the block are stronger in yellow just as the original posters example.

stampCat7,
Have you considered sending yours in for certification?

I think that Occam's Razor applies with the majority of posts we see online with these type 'color errors'. Could there be a few legitimate printing freaks, of course there could be.

But a certification body with 'stamps in hand' and the ability to run the stamps through a VSC6000 color comparator (which uses both visible and nonvisible light spectrum analysis) have a distinct advantage over online images and speculation if the item has ever seen sunlight sitting around in the PO distribution chain or after it was purchased.

These type threads it is common that the OP is seeking verification with additional examples. In the past, some folks ignore examples that do not support their hopes of an error and instead focus only on posts which support their desires.
Having certified items makes for a much more definitive comparison.
Don