Does the addition of Hydrochloric acid help to maintain its working strength also?
--- In Homebrew_PCBs@yahoogroups.com, toddroberts2001@... wrote:
>
> In a message dated free areas, I am able to monitor
> the process.
>
> Rick
>
> Good point Rick. It sounds like you are trying to see up through the
> board from the bottom up. Have you tried placing a bulb over top of the
> etching tub?
>
> I use one of those hand-held trouble lights and hold it directly over
> my etching tray so I can see what is going on with the board
> and check it every few minutes. Usually it is pretty easy for me
> to see when the copper is etched off the board. Not making the etchant
> level more than
> an inch deep over the board helps also. But I guess when the etchant gets
> too dark
> it can make it hard to see the board when it is submerged. The Ferric
> Chloride
> is already pretty dark to begin with.
>
> 73 Todd WD4NGG
>