DJ Delorie wrote:
>
> New trick: run the result through the laminator at 200F (94C) - BELOW
> the boiling point of water. No new bubbles! I wonder if remaining
> water was forming steam bubbles. The temperature control hack for my
> laminator is really coming in handy!
I thought running the dry film through the laminator after hot water
lamination will over cure it, but your are the second person here that
says to do it. If it works that's fantastic because spread hot water not
always make all board surface at enough temperature.
> I also discovered that Liquid Tin won't last forever in the tray (even
> covered) but does seem to last forever in the original bottles. I
> wonder if just adding more water will re-constitute it?
>
>
>
Not that I am an expert or know much about chemistry. But immersion tin
is a mix like one of the tin electro plating chemistries with thioreia
added. In your case is the fluoroburate mix. Most tin plating
chemistries have the tin(iv) deposition problem in contact with air or
light, which should be your white deposit problem too. So tin
concentration is much lower than required to work. I think sulfonate mix
last even longer than yours but only used sulfuric based which last less
than one month. Is better keep in dark closed bottle full, no air
inside. If you wish to add something to keep it working is tin salt. In
your case stannous fluoroburate. Or try pure tin bars on it with
electric current, but i don't know how thioreia in there will end after
the electrolysis ( but thioreia is also an addictive for at least the
electroplating of copper so...).
>
> I haven't tried press-n-peel TT paper yet. If it performs as
> advertised, it would be a much faster way to do thick-trace boards:
> laser print on PnP, laminate, peel, etch, strip. For UV, it's print
> (takes a while), laminate film, expose, wait, develop, etch, strip.
>
>
You have so much projects shared openly in your webpage, and are a so
valuable open source contributor to electronics tools. Check this:
http://www.techniks.com/free_pnp.htmAlmost 10 years ago, i got (don't really know how or why), 20 sheets
with oversea shipping (i am Portuguese) for free! And later bought
100sheets, some still last today.
Press n peel should make good results as those green sheets used after
toner transfer. But still is much about copper cleaning and printer.