Finding Watermarks Using Ronson Butane Fuel

I have watched experts put examples of C3a into Ronsonal lighter fluid. I myself have used it thousands of times without a problem. But good ventilation is a must, as mentioned above.

Years ago, I used Carbon tetrachloride, sold cheaply as a spot remover under the trade name Csrbona, for watermark detection.
It was dangerous carcinogen and has since been removed from the market. Ronsonal works well with the exception of a few European stams where it re dissolves the ink. Most dealers I know use Ronsonal.

Just buy naphtha at the hardware store. Much cheaper.

hi rog;
Heads up on the paint department type of nap as it isn't the same as the lighter fluids, its way 'dirtier' than the lighter fluids.

On the Carbon Tet it is cleaner than the lighter fluids and cleaner than the MEK, but like mentioned above, it is a very carcinogenic product.

I got one quart so far from paint dept as refill for my emptied Ronsonol; it is not dirtier than what came in Ronsonol.
I suspect talk of dirtier naphtha is really a matter of random minor contamination, perhaps more likely from some sources, or was more likely in the past?

Naphtha from the hardware store is just as "clean" as lighter fluid.

Hi all;
it seems that the main point would be that the product Ronsonol made by Zippo after 2010 has a composition of 70% light hydrotreated distillates with 30% hydrotreated light naphtha.
the straight hydrotreated naphtha (Klean-Strip VM&P) is 95% from the paint store, heavy and oily from the other aliphatic hydrocarbons c7-c9, and many others.
my summation would be for the lighter fluid as the lighter solvents will have less impact on the physical aspects of the stamp papers.
faster evaporation is a plus for clue to better solvents, but way more flammable.
safety first always.