Homebrew PCBs

Stefan Trethan wrote:

> On Wed, 18 May 2005 12:20:34 -0400, Alan King <alan@...> wrote:
> 
> 
>>  Now don't go jumping to any crazy, non-scientific conclusions there.   
>>Most
>>solder mask is pure liquid latex, and survives 700 degrees wave  
>>soldering, so of
>>course it will survive a fuser.
>>
> 
> 
> 
> Ok so i will have to try. I was eager to abandon the idea 'cause i will  
> feel kind of foolish asking for it in the shop after i have found out by  
> accident what some people do with it (while searching for the article list  
> of that shop on the web). I certainly did not need to know that....
> 
> By the way i did not know soldermask is latex? seems harder than i would  
> expect?
> 

   PS but first, History channel Modern Marvels tonight has rubber as the 
subject for one of the hours, should repeat again in 3-4 hours.

   Anything that masks solder is solder mask, no one said it had to be what 
comes attached to the board.  There are probably 5 or 10 other things commonly 
used as solder mask, liquid rubber types and tapes are the most common.  You 
guys do realize that they use SOMETHING to keep solder off gold fingers and 
other holes to be hand soldered after the wave don't you?  It's called mask, it 
isn't all about the board..


   And yep people in general have about a 5 y. o. mentality.  Happened to see 
the Oprah show last week on colon health, and while there were a few admittedly 
funny thing it wore thin fast how often they stopped the show to giggle over the 
same dumb things they just laughed about 15 seconds ago, you'd think it was a 
kindergarten class for the audience..  Bunch of Beavis and Buttheads in the 
world, and usually the same people who'd swear up and down they weren't that 
ignorant if you asked them.  Can't let the idiots stop you though..

   No idea if it will work well for toner transfer, but it definitely has the 
right kind of properties after seeing it in action in a solder wave machine.


   PPS they had fire rated silicone caulk at Lowe's here, $13 and $15 for gray 
and red 10 oz tubes respectively.  Not cheap but maybe not bad vs $10/50 sheet 
paper or similar since it'd probably do 100 or 200 sheets or more.

   Had another kind that was only $4/tube, said high heat but then only to 100 
deg F in the text, for not drying out fast I assume.  May still stand up to a 
fuser pass or two.

Alan