Homebrew PCBs

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
>