Homebrew PCBs

DJ Delorie wrote:

> 
> Huh. Cold seems to work just fine, though, but forgetting to rinse
> results in a horrible mess. I'll have to re-read the directions on
> the bottle.

If cold water works, great. I have washed fat dirty dishes with cold
water some times already. 

And to who says it's expensive. This side of the Atlantic bungard sells
an unmixed kit that only lasts 1 month after mixed, for 25eur!. And if
keep the bottle full to avoid air and away from light, like inside a
whisky bottle can. But thats bungard if they didn't sell crap, the
market was already satisfied. And mgchemicals bottle is transparent, and
the liquid can be left on the tray and still works, so don't complain. 

> 
> Then again, MG said their UV film wouldn't develop in sodium carbonate
> but that works just fine too.

There is a messenger to blame for that (me)! I said riston manual also
have sodium carbonate instructions and according to msds the composition
have similarities. But if you are using NaHCO3 easier to get, it may be
becoming Na2CO3 in half concentration. So if your developing times
increased (dry film not code hopefully :>), it can explain the problems
you reported with dry film. And you should follow the manual and get
some potassium carbonate from ebay for cheap.