Hello mpdickens,
Wednesday, November 12, 2003, 5:40:56 AM, you wrote:
<snip>
m> I use quantity-4, 8-watt black lights. They emit UV
m> radiation around 325 to 350nM range which is the part
m> of the spectrum this type of resist reacts to. So, my
m> exposures are short: Depending on the size of the card
m> and the distance from the lamps, anywhere from 30
m> seconds to 5 minutes.
And I replied:
Do visit the following location
http://www.stoufer.net and try to find the
explanation on using the 21 step Stoufer gauge for determining the right
time for wxposure. The board area is in no relation to eposure time. Only
the distance from the bulbs to ypur artwork/board combo.
--
Best Regards,
Zoran
mailto:
zasto@...