Since this thread has (naturally) progressed to track drawing methods, it has peeked my interest into this UV business. So let's say I would want to get away from Sharpie's, what are my options? 1) Buy a laser printer (which I don't exactly have the money for), transfer onto some special paper and then iron on the tracks? (I might not have the method exactly right, but something along those lines??). 2) The UV method... anything else? If I wanted to do UV, what do I need? Can I do it with regular copper clad boards, or do I have to get "pre-sensitized" boards. How much am I looking at to build a UV box? Or do I need a box? Someone mentioned simply using their desk lamp.. is it possible to just get a UV tube and do it this way? I'm totally foreign to the idea of UV transfer, and the recent postings have both informed about it, yet confused me about the process. Thanks again, Jai Quoting Mike Harrison : > There are 3 types of tube commonly available : > 1) 'Blacklight' - used for effects lighting - these look black - not used > them, they may be > suitable, but may extend exposure time > 2) Insect killer tubes - these look while (like normal tubes) when off - > these are the ideal type > for PCB exposure > 3) Germicidal (also for eprom erasers) - These look transparent - they emit > shortwave UV hazardous > to skin and eyes, and are no good for PCB exposure. > > > On Tue, 1 Apr 2003 11:24:00 +1200, you wrote: > > >> On Tue, 2003-04-01 at 12:17, Kyrre Aalerud wrote: > >> > I use 3x 4w UV tubes and need 15 minutes for single transparancy and 30 > >mins > >> > for double. > >> > Are you perhaps using 30w tubes ? (I'm trying to make a small compact > >> > lightbox as the one I have is clearly too low power... > >> > >> My small commercially made light box has two 8W tubes and takes about 4 > >> minutes per side (it can only expose one side at a time). Maybe your > >> tubes are putting out the wrong wavelength of UV? > > > >There are "black light" UV tubes and long wavelength germicidal tubes. You > >want the latter. > >Black light tubes are dark almost black when off and a very deep purple > when > >running. > >Germicidal etc tubes are usually clear and have a violent purple look when > >you look at them - for a few seconds anyway - don't do it ! > > > > > > RM > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > ---------------------------------------- This mail sent through www.mywaterloo.ca -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu