If anyone is interested here is what I have found after much research. Based on US Navy specifications.
65% Water.
20% Borax.
15% Boric Acid.
By weight.
Or
5 qts water.
3 pounds Borax.
2 pounds Boric Acid.
Heat slightly to dissolve.
This is equivalent to the commercial products avaiable on the market.
This 60/40 mix of Borax and Boric gives the maximum solubility in Water. The above mixture will yeild a solution containing 15.8% borates.
