Hi wrote:

http://www.colba.net/~fotochem/index.htm for sodium metaborate
69 grams of 20 Mule Team borax +14.5 grams of Red Devil lye in a liter
of solution is close enough to a 10% solution of Kodalk for government
work. Kodalk is sodiun metaborate tetrahydrate. The reason the
ingredients do not add to 100 grams is the 4 molecules of water that are
present in Kodalk but not in the borax-lye combination, among other
things.