A while back, Bill (wsbailey) made mentioned that it takes a light hand, when using chemicals in the dying process. The comment reminded me of my college chemistry classes, where we would do titration experiments, neutralizing acidic mixtures with bases. The pH scale is a logorithmic scale, meaning that each number represents a ten fold change in concentration. When you are near a pH of 7 (neutral), it take only a tiny amount of acid of base to tip the scale in either direction.
Bill - I found your comment to be sage advice.
Anyway, this just gave me an opportunity to share a couple references I found, after reading Bill's comment.
Funny how I can tie so many aspects back to fly tying.
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)