Non-fake Apple 1 on ebay

Chuck Guzis wrote: ID11 is basically D76 with an Ilford twist. Same basic chemical constituents, same process times and temperatures, and so on. Photochemicals don't usually turn your hands brown -- most of them are clear (with the exception of indicator stopbaths which are either yellow, purple or some colour in between depending on their current pH). Now ferric chloride PCB etchant on the other hand.... That stuff is just nasty. Normally when I etch PCBs, I drill a hole into the corner and insert a bit of hookup wire into the hole to when removing the board from the tank. Problem is, in this case I forgot to do that -- so I drained the tank and retrieved the board from the bottom of the tank. In hindsight I should have washed the inside of the tank before shoving my hand in there.. I ended up with bright yellow stains half-way up my arm. That's not a mistake you tend to make twice. On the plus side, it's still cheaper (and somewhat easier to handle) than persulphate based etchants. -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/