G&K Watermark Detecting Fluid

Been using this watermark fluid since the day it came on the market. Never had a bit of a problem, When the electronic watermark detectors don't seem to do the job, ever if the cost more than $300, this liquid does what it is designed to do -- show the watermark. It is save to use on all stamps.

Used this product to determine watermarks on postage stamps for collecting purposes. Great dispenser, very effective product that I would gladly purchase again!

This fluid worked pretty well. I wish it were clearer and lasted longer but by adding a drop or two, I was able to see the watermark and compare it with those used at the time. I bought it specifically to use on a set of old Persian stamps. They dried very quickly with no damage to the stamps.

Cheaper than Clarigy, but flammable and must be used with good ventilation. Clarity is safer.

Ordinary lighter fluid does ten times better job for a fraction of the cost!! ARH

The product is wonderful. It is the best I have seen in my 60 years of collecting. The problem I had was that the bottle was only half filled. I wrote to the company on two separate occasions and received no answer. It is a shame because the product, IMHO, is the best.

Got this a gift for my dad along with other stuff needed for his stamp collection and he loves it. And he is one tough guy to please when it comes down to gift giving.

Fast, easy to use, and evaporates quickly. Excellent watermark fluid. Must have a very dark (black) background for best results.