When paper has been folded to the point that a visible line shows in the paper when you look at it with watermark fluid. This is usually apparent with the naked eye, but sometimes unscrupulous people have "ironed out" a crease.
When the paper has been folded, but does not break the fibers as in a CREASE.
Hinge Remnant. Small means only a small piece is left on the stamp, Large means a most of the remnant is left on the stamp.
Just HR means all the adhesive side is left on the stamp, the folded side generally is gone.
HHR Heavy Hinge Remnant. The old paper hinges, or sometimes HHR's which means more than one HR left on the stamp.
Pulled perf. Where a perf has been pulled off below the normal line where the
holes are cut. Almost appears as a torn out part of the stamp where the perf should have been.
When printed, the paper went thru the press not flat and a small wrinkle was present. Later after printing the paper can be opened and an unprinted area appears. Of course the stamp is usually not squared as is normal. This is a desirable minor variety.
Perforation.
A perf which was torn off noticeably lower than the rest of the perfs on a stamp.
An area where the paper has been thinned by the removal of a hinge. Usually about the size of the contact area of the hinge and the stamp. Can vary in size.
PIN HOLE : An actual pin hole in the stamp. In the early days of the hobby, stamp dealers used to place their wares on cork display board and used a pin to attach them. On many early stamp this is somewhat common. A PIN HOLE THIN describes a minute thin the size of a small pin hole.
TINY THIN: Very tiny thin. Most people do not see it even in watermark fluid.
SMALL THIN: A small thin usually just visible in watermark fluid.
THIN: A larger thin, usually visible with the naked eye, if stamp is held to light.
HOLE: An actual hole in the stamp.
