[sswee]

[quote=yoyoboy]Thanks for all the help!
Sswee- are you saying that I should keep the power on untel the voltage starts to drop? And considering the variables not to worry about the projected time given by the 720 rule?

Not that you should but you can if you want a thicker coating. The 720 rule works. The time and set current in the calculator are good but the peak voltage is just an approximate due to all the variables. As acidrain said the 7000 grade aluminum uses lower voltages. The differences in the aluminum grades has alot to do with their conductivity. I haven't had any trouble since I started using it with the exception of material that was a poor grade to anodize. As long as the voltage climbs, the anodic coating is growing faster than it can be eaten by the acid. The acid eating the anodic coating is called dissolution. Dye only penetrates .7 mil deep, so there are no benefits for dyeing in going thicker. The 11.25V you refer to as PAR is the calculated peak voltage. PAR is the peak anodic resistance measured in ohms. It has to be calculated with the two known variables of voltage and current used on the part. I hope I haven't rambled too much for you.

SS