You can make a 30% sodium metaborate equivalent solution (same as Kodalk) by mixing 136 grams of Mule Team Borax with 29 grams of Red Devil Lye to make one liter of total solution. You can find these brands in the cleaning department of virtually all grocery stores.
Originally Posted by lee
Start with 750 ml of water, first add the Mule Team Borax and dissolve, then add the Red Devil Lye. Top the container to 1000ml and you have a 30% soidum metaborate solution that is same as the Stock B solution used in PMK.
I imagine that you would want tio dilute this for the alkaline pre-soak, however.