Identify Watermarks Without Fluid? Any Tools?

So I have piles of stamps separated out and many can't be identified until I get to finding watermarks. My local stamp store uses watermark fluid in a small black container. He puts the stamps in, pour a small amount of fluid in and then pours the excess back into the bottle.... Wouldn't it be better to use a dropper and drop small amounts onto the stamp instead?

Also, are there any tools that don't require fluid at all? I saw a discontinued product that used blue ink in a pouch to show watermarks, looked cool but can't find it available anymore. Also saw a machine that used different color lights but was way too expensive. Any thoughts??

Finally, I tried holding the stamps up to light and I can't see anything lol.

SAFE Signoscope T1
I bought one but sold it later as it was not worth the money.
It is quite tricky to use.

hello, I have a different experience :)

since I bought my Signoscope T1 (used about 50 USD), I never used fluid anymore. Yes, you need to get used to it and in general to watermark detecting. But if you adapt the light force and especially use the fitting foils (which you can get from SAFE, I got them for free just by writing them), you can also see watermarks from US older stamps. Sometimes it's better without foil, sometimes better with foil, sometimes one foil or two foils, the same foil or different ones (they com in different kinds).

so after all I am really happy with it. And I always would buy T1, not T2, as this is not easier to use.

Spartcom5, sorry, but in my opinion you need to watermark using the fluid of your choice. Watermarking involves more than identifying the watermark on the stamp in question, watermarking will also show faults much easier.

Stampmaster