I have found recommendations for making a soldering flux using boric acid mixed in with ethyl alcohol in 50/50 ration or 60/40 depending on the consistency desired.
Some have recommended that methyl alcohol is better to use as more of the boric acid can be dissolved in it? Is this correct?
If so, how do I calculate how much boric acid I can dissolve in isopropyl alcohol? What would be the best solvent to create a paste of boric acid to use as a soldering flux?