This is a link to a table of recipes for forge welding fluxes. The table is compiled from a large number of blacksmithing books dating back to the late 1800’s. Also included are sources and current costs for the ingredients.
Download the document HERE
Article by Steve McGrew 
This is one of the BEST articles I’ve seen on fluxes in one place. Nicely done Steve, and much appreciated.
I have a reprint copy of the 1891 book, but this is piece is printable, and wall hangable.
Cliff20
Cliff,
You’re most welcome. It seemed like information that needed to be assembled in one place.
Steve
This is really good. Options, options, options. Now to get something similar about the post forging treatments such as bees’ wax and the various other metal anti-corrosion protection recipes. Is there such a thing?