>Interesting you mention spray. I was looking into this for rinsing my boards
>(thinking ouf using spray nozzles from a car windshield washer) and thought a
>about it for etchant, but decided to choose an etchant before investigating
>if the etchant would corrode/damage the pump. I would ask what spray system
>you use, but my guess is that anything industry-specific will be $$$.
Neil
As Marty stated, constucting a spraying etcher is not that difficult.
I have one for home use that I bought from a small german company.
Anyways, all it (basically) consist of is a plastic container. From
the top to bottom there is a tube with fine holes in it. The tube is
turned from a motor that is mounted on top of the box cover. The tube
is having three bigger holes on it's lower end (it's otherwise
closed). This end is then placed so as it reaches the etchant floating
on the bottom of the box. The etchant enters the tube from the bottom.
Since the tube turns quickly, the etchant is then pressed towards the
tube walls and since there are small holes it leaves the tube therby
spraying.
Unfortunately the guy running this company seems to be a bit an a∗ and
I don't recommend buying from him dut to several reasons. I don't want
to go into these details here cause this is a group about PCB's and
not one to discuss political stuff. Anyways, I created a little page
for you that showes three pictures of the device so as you get the
idea.
http://www.myhome.ch/mzingg/pcbstuff/Markus