Lastly, this 5c value, which is perforated 12, is from the last printings made after 1864. It is very similar to the gum on the Newfoundland stamps above, but is a bit shinier. I would describe it as colourless, evenly applied and semi-gloss.
However, it is important to look at more than one set to understand the gums that the American Bank Note Company used. So lets take a look at the Nova Scotia Cents Issue that was printed at the same time as the New Brunswick Issue above:
I mentioned in an earlier post that the 1859-67 Cents of Canada:
The only drawback to the above tests I find is that you can have a stamp with genuine original gum where the gum has either been re-distributed or sweated, or otherwise disturbed that can fail tests 1 and 3. So you really do need to have some familarity with the gum normally found on the stamps printed by a particular printing firm at a particular time. After a while you will get a 6th sense about whether the gum "looks right".
Any questions, comments?