Homebrew PCBs

Russell Shaw wrote:
> Leon wrote:
>> ----- Original Message ----- 
>> From: "jusdebra" <pookie_debra@...>
>> To: <Homebrew_PCBs@yahoogroups.com>
>> Sent: Wednesday, April 11, 2007 9:17 PM
>> Subject: Re: [Homebrew_PCBs] Re: Newbie questions
>>
>>
>>> OMG, my dad is a Dave Miller.  Almost freaked me out when I saw it.  I was 
>>> thinking, "Is he in this group?"
>>>
>>>  Anyway, you guys have me confused again.  Some recommend acid and some 
>>> alkali.  I've worked with both in some very strong concentrations and know 
>>> how to handle them.  I have a $300 respirator with O2 feed and lots of 
>>> gloves.  My biggest question is the type of paper you use in the printer 
>>> so you can get a transfer.  Where do you get it?  Also a good source for 
>>> blank boards (single side to start with).  What about software?  Is there 
>>> a freeware that works good for simple layouts?  Is there a standard 
>>> commercial package that everyone uses or is the most popular.  I've read 
>>> about Eagle????
>>>  I've done some layouts by hand with a felt tip pen, but it's time 
>>> consuming and difficult to edit.
>> We were discussing the photo etch process, not toner transfer. NaOH solution 
>> is for developing the resist after UV exposure.
> 
> I use 10% Na2CO3 sodium carbonate for the developing. Unlike NaOH,
> it's much less reactive to skin.

Correction: It was 1% Na2CO3 sodium carbonate i use for negative resist.