copy cad solution

[peterprv]

How long should I expect the zinc (copy cad) solution to last before it's diluted? Is it ok to add fresh water to the tank to maintain the correct level?

peterprv

[XK120DHC]

Originally Posted by peterprv

How long should I expect the zinc (copy cad) solution to last before it's diluted? Is it ok to add fresh water to the tank to maintain the correct level?
peterprv

Peter;
NEVER add "fresh" (tap) water.. ALWAYS use Distilled Water to top-up your tank.. Assuming you are using the Caswell "buckets", it's a wise move to mark the "full level" in the outside of the bucket, using a Sharpie or Marks-A-Lot..
I read somewhere in the Caswell Plating Manual that the solution will last for "X Number" of square inches of plating, be dipped if I can find that info now..

[seanc]

Originally Posted by peterprv

How long should I expect the zinc (copy cad) solution to last before it's diluted? Is it ok to add fresh water to the tank to maintain the correct level?

The electrolyte itself should last indefinitely. It does not wear out or "expire" w/age.

If your liquid level is dropping due to evaporation, then yes, you can top it off w/more water.

But if your liquid level is dropping due to "dragout" (electrolyte remaining on the parts when you remove them), that needs to be replenished w/fresh solution.

Let your parts drain off well over the tank before going to rinse, and you won't lose much at all.

Sean

[peterprv]

Thank you for your reply. I only use distilled water in my tanks. I will pay more attention when I remove the parts from the tank. I must say, this site and your knowledge on the subject has helped me through fustrating times. At this time the results are what I expected when I purchased the kit. Before that things were a bit dicey, burnt parts etc. I'm more organized now.

Peter