CamoRoon wrote:It is in fact a paste when used to calibrate hygrometers. I am not promoting either scenario. I was just wondering if there are any reasons it could not work. The saturation points on the various salts can be found online and experimentation of mixtures could certainly arrive at any given % of RH. I guess the bigger question is whether there is anything in a slat that could possibly get airborne and have a negative effect on your cigars.
Yes, when used to calibrate hygrometers, it is a paste. But that's just table salt and water. I was under the impression, maybe wrongly, that you wanted to duplicate the boveda formula for more specific RH targets. Their packs use a mixture of salts and other ingredients at various concentrations. They are actually a gelled liquid until they start to dry out.
In looking at the SDS sheets for the 62% through 78%, I see nothing outwardly dangerous. Water, sodium chloride (table salt), ammonium chloride (used in food production), potassium chloride (used in food production and available as dietary supplement), guar & xanthan gums (used in food as a thickener), citric acid (food production).
Some of the higher/lower RH packs and the oxygen scavenger pack have stuff in them that could be uncomfortable if ingested.
As for getting airborne, well, there is the obvious, you could end up with a cigar that has salt crystals on the wrapper.
Here's the link to the SDSs
https://bovedainc.com/safety-data-sheets/