Homebrew PCBs

yes it hardens in the presents of carbon dioxide, they
use it in foundry work to harden the sand molds
instead of baking lindseed oil in the sand. i just
dont know how fast it will soften in liquid etchant or
if it will soften.
mebo




--- Steve <alienrelics@...> wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "pebo festus"
> <mebo31@y...> wrote:
> > i was just wondering if any one has tried putting
> water glass (sodium 
> > silicate) in a printer cartarage, printing the
> traces, then expose 
> > the water glass to carbon dioxide to make it
> harden, then etch,
> > i havent tryed it yet but will soon, i wiil put a
> dot on a pcb and (i 
> > have some gas to corbonate beer with)and harden
> the dot.i will see if 
> > the water glass will desolve in the etchant.  am
> working on a 
> > repeater for the ham club now and dont have time.
> if any one has 
> > tried this let me know,so i will not have to
> reinvent the wheel.
> > mebo31
> 
> It hardens in the presence of carbon dioxide?
> 
> I thought you'd just let it dry.
> 
> I suspect, as Stefan says, you'd need a piezo head
> inkjet, not a
> bubblejet.
> 
> I think, correct me please if I'm wrong, that the
> only desktop inkjet
> printer with piezo heads are Epson. I have an Epson
> 800 (black only)
> inkjet that I'm half done cleaning out the heads so
> I can try Future
> Floor polish in it. I don't have an empty cartridge
> for it, though, so
> I'll have to rig up something else.
> 
> From the descriptions of water glass on the web, a
> thin coat of it may
> not work. Worth a try!
> 
> Steve
> 
> 
> 
> 


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