[sage]

You are right. The 720 rule is the better way to get consistant results and I realize the variablity in my old way. I think I was restricted to getting good results by the limitation of my power supply - which USED to be an automatic battery charger that luckily seemed to regulate voltage and current to coincidently put almost every batch within the 720 rule calculations. Dumb luck I guess.

BUT - what of the Caswell figures? As you too have calculated these are very different CD's. I believe there was one other set of figures quoted which give yet another CD. If so many CD's are acceptable this tells me that there may be somehing else going on that is the REAL key to proper anodizing.

I understand your point that all the methods are based on the same concepts. I think we all realize it's current and time. But to say that they are all the SAME is not true especially when they cannot be proven by using the numbers from one method in the calculations for another.

So I haven't really been convinced WHY the 720 rule is THE way to do things and that it properly describes what is going on when there are so many contradictory methods that achive good results.

I guess results and repeatability is what really counts. The 720 rule works for me so I'll stick with it and accept the results.


sage