Gum Crease - a naturally occurring crease found on flat plate stamps, usually caused by handling during production.
Figure 2. A heavily hinged stamp from Burma. The stamp shows browning around the hinge remnant. It also suffers from toning and a heavy gum crease. Click on image to enlarge.
Give attention to gum. The stamp gum is the glue found on the backside of a stamp. An extremely fine or mint postage stamps has a perfect gum that is still original and intact. The stamp does not have gum skips or heavy natural gum creases.
Gum crease - A crease ironed out of the paper of an unused postage stamp but clearly visible in the gum; in some cases the crease is actually caused by warping and subsequent cracking of the gum.
N G C: auction abbreviation term for Natural Gum Crease.
NGR: Natal Government Railways, punch-perforated on stamps of Natal.
N G S: auction abbreviation term for Natural Gum Skip.
Ngultrum: currency unit in Bhutan.
 See also: Stamp, Used, Perforation, Crease, Sheet
  
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