Do yourself a favor and get a pH meter. These are dirt cheap and can be gotten from many sources. pH strips are nice for getting into the ball park, but a pH meter gives you real numbers down to 0.1 or 0.2 pH, depending on what you spend.
Good advice since making your own Kodalk can be tricky. The only good way is to accurately measure the amounts of lye and borax. There is a couple of methods based on observation that are rather worthless. Even a small excess of lye can really throw off the pH of the final product. It is therefore better to err on the side of too little rather than too much lye.
Last edited by Gerald C Koch; 10-13-2013 at 02:40 PM. Click to view previous post history.
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.