Homebrew PCBs

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