On Sat, 2012-02-25 at 23:41 -0600, Jon Elson wrote: > > On Saturday, February 25, 2012 02:36:41 PM Kirk Wallace did opine: > > > >> I also have my father's darkroom > >> equipment, but getting it all working again could be a whole other > time > >> and money sink. > Well, getting enough working to contact print some litho film from > some sort of master, perhaps a laser printer output,
I don't think laser printer output is nearly fine enough for .005" lines and spaces, at least for a contact print. > shouldn't be a huge deal. You need a vacuum frame, or even a piece > of glass with a chunk of foam rubber to apply even pressure > to hold the film against the master. Room light for a few seconds can > be your exposure source. You need litho developer, you can generally > skip the stop bath, and you need fixer. Wash in running water, hang > to dry. > > Metal/porcelain trays should be easy to clean and use, plastic trays > may get brittle after a while. > > So, the biggest problem might be getting the film and chemicals in > small quantities. > I'm now getting chemistry from Xpedex, and buying recently expired > Kodak > PRD film > off eBay. > > Jon I'm thinking of a single line mask scaled up by 25x taped to a box with a strobe inside. Then mount the target to a rotary table and flash each line in sequence through a camera lens to get the proper scale. It could take a long time to do 1000 lines, but I think I know of some software that could automate the process. this link: http://unblinkingeye.com/Articles/Emulsion/emulsion.html links to this emulsion supplier: http://www.artcraftchemicals.com/products/ http://www.artcraftchemicals.com/products/products-page/rockland-products/photographic-emulsions1/liquid-light-emulsion/ Or, I suppose I could use film bounded to the encoder disk. It looks like Amazon has developer and fixer for B&W film. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
