On 9/14/2013 2:36 PM, Victor Manta wrote:
How would you describe the condition of this S/S?

Perhaps lightly wrinkled.

How would you grade its quality?

I understand 'grade' to mostly refer to centering, of single stamps.
That is not so much an issue for SS, but this one is well centered.


http://www.artonstamps.org/topicals/...sheet-face.pdf
http://www.artonstamps.org/topicals/...sheet-back.pdf

Would someone also explain what causes such flows.

Do you mean real flaws? (if so, which? I am not sure I see any other
than some minor curl and wrinkle) or apparent flaws from the scan
shadow? For the latter, a scanner has to have the light offset from the
sensors, (and the sensors shielded from the light). The scanner used
here seems to have sensors pointing straight up with light hitting as a
noticeable angle. Did you have the lid down on the scanner, to flatten
the sheet?

Terry

TIA.

Note about the scans:
The gray band on the top of the image of the back is a shadow that
doesn't really appear on the S/S. The same applies to the gray shadows
that appear on the indentations (saliencies?) on both faces and
certainly highlight (by amplifying) the flaws.