I wouldn't turn around and sell a
drop I've flame-proofed with the selling
point, "Hey, this is flame-proof," but what venutech suggested isn't much different from how typical meetings with fire marshals go. They'll ask if it's flame retarded, you say yes, they ask for a sample, they burn the sample, they find the sample does/doesn't burn, and make their decision based on that. The
fire marshal can make a more educated decision if they know what it is you used to flame retard an object, and then when the staffing changes over the course of a few years, someone can still identify what was used to flame retard that object and when the flame retardant it was applied.
In the end, samples are what make the world go 'round, but sometimes having the documentation is what's critical. I purchased some fabric from Rose Brand earlier this year, some
IFR White Trevira
Muslin, that during a field test looks like it'd
send the
theatre up in
smoke. However, documentation from Rose Brand notes that this fabric, while it appears to be the most flammable thing in the room, is actually
IFR and during larger
NFPA tests, performed actually quite well. Without that documentation,
AHJ would not have approved that material to be used.
Then, of course, because they are running a business in the flame-retarded fabric industry, Rose Brand also includes the certifications that show the tests were performed by qualified, competent individuals. For local stuff that you don't plan on selling to people across the country, you probably don't need anything that shows that it passed heavy-duty
NFPA tests. If you'd like, though, you can always ask the local
fire marshal to sign a document stating the results of his/her tests. Several years down the
road, though, they're still going to want to burn some more samples again.