Homebrew PCBs

Is there a way to get the "Cured" emulsion off of the traces after 
etching?






--- In Homebrew_PCBs@yahoogroups.com, "hjf2k2" <drgenio@h...> wrote:
> Hi all, i've been testing a way to make photo etching cheap'n easy. I
> went to a Screen-print shop and bought photosensitive emulsion, the
> cheapest type. I mixed the components and painted the emulsion on the
> copper. Then I let it dry overnight in a (pitch) dark place.
> On a transparency I printed the negative of my circuit and placed the
> transparency, toner side to the emulsion and placed it under a
> fluorescent lamp for 7 minutes or so. I removed the board and nothing
> seemed to change, until I ran some water over the board, and with a
> hair brush  for babies (the softer-than-hair type) i helped the 
water.
> The exposed areas dried up but the rest washed with water. GREAT
> precision, SMD quality. Then I let the board again now in the sun to
> totally burn the emulsion and it was ready for etching, warm (hot)
> ferric chloride.
> 
> Hope that helps.
> Some day I'll try the AZO-based emulsion, but that one needs UV 
curing.