Watermarking trials and tribulations

I agree with you. In general I find the watermarks of the 1960s and 1970s from the Commonwealth especially difficult to identify.

Jacques

check this thread out - stampbears.net/thread/1306/watermark-extraction-technique

ahhh i see...

i (like you ) just use lighter fluid and a dark tray ..... wish i could be more help man..

Greetings Mr. MikeC99
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I find that lighter fluid does linger longer on stamps than the commercial watermark fluid . . . even if it is a nanosecond or two. The biggest advantage is the cost between the two.
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Regardless of which is used, I find it is a good idea to not make a marathon out of trying to detect watermarks. After a minute or so the fumes tend to make either the eyes or brain blurry -- most of the time both. For us that don't think so well to begin with, only spend a short amount of time bent over inhaling those vapors while watermark detecting.  In the long run, it saves making mistakes.
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Respectfully,

Gordon Lee

Brought to you this fine Sunday afternoon as the Gordon Lee Sermon of the Day.