[ARC5] WHINK and crystals.

[Kenneth G. Gordon]

On 26 Jun 2013 at 16:21, Tim wrote:

> Hi Ken -
> I KNEW that the GRC-109 could not have failed!  LOL

Well, I was pretty certain it hadn't, but I had to make sure. It hasn't been 
used in at least 10 years.

> Which Whink product did you use?  There's many.

I had no idea. The only one I have ever seen in our stores is that one which 
has a small amount of HF in it. It is sold as "Rust Remover" and is in the 
laundry products aisle of our local (3 blocks away) supermarket.

>  Lye based?

No. HF. Hydrogen Flouride. Hydroflouric acid.

> Also, agitating the solution might make a difference in the amount of
> time needed. Good stuff - Thanks! Tim N6CC

Well, the stuff scares the crap out of me, Tim. I am using the absolute 
minimum I can get away with.

Ken W7EKB