Urgh... you're asking me to _remember_ something? It's a very long time ago but I think I used one of the "artistic" filters in PS to pick up the edges of an image, turned that into a negative as it made the edges light against a black background before reversal, and then printed that onto the film. This gave a predominantly blue background with a white image. It was only for a class on photochemistry, so the quality of the image wasn't important to anyone but me. Quite a bit of experimentation was needed with exposure. There was almost no consistency between images made with the same negative, due to the handmade nature of the substrate.
> On 06 March 2016 at 18:07 Darren Addy <[email protected]> wrote: > > > Mike, > I'd love to have some links on how to do digital negatives for > cyanotypes on LASER printers. Didn't know that was possible. I've got > access to good laser printers at work (including a copier that can do > 11x17) and I've got a Liquid Cyanotype kit from Photographer's > Formulary sitting here itching to do some watercolor paper cyanotypes > of a particular digital image that I have. I've got a pack of > transparency material also. > > Thanks in advance! > > On Sun, Mar 6, 2016 at 11:49 AM, mike wilson <[email protected]> wrote: > >> On 06 March 2016 at 17:40 Darren Addy <[email protected]> wrote: > >> > >> > >> I tend to agree with you Mike. > >> With the prices at places like sharpprints.com I find it hard to > >> justify the expense of an inkjet. In many cases you are going to have > >> to gamble on $100 or more for a set of ink just to see what you've > >> got. I'm in that position right now with an old Epson R800. It was > >> given to me and I assume there will be heads clogged (which is why I'm > >> researching). I'm mostly interested in using it to print on overhead > >> transparency material to make digital negatives for contact > >> printing/alternative processing. I think I remember seeing a process > >> that will allow you to use only three black/grey inks (that you can > >> put in any three working positions on your printer (forget the clogged > >> ones)... so may try that approach if I can't get all of them > >> unplugged. > > > > That sounds interesting. I've used laser printed ones to make negs for > > cyanotypes. Keeping us informed of progress would be appreciated, at least > > by > > me. > > > >> > >> If I can learn the transparency digital negative technique, I might > >> think about a wide format printer for the same purpose, down the road. > >> > >> On Sun, Mar 6, 2016 at 11:30 AM, mike wilson <[email protected]> > >> wrote: > >> >> On 06 March 2016 at 01:08 Darren Addy <[email protected]> wrote: > >> >> > >> >> > >> >> This is a side discussion to Ann's purchase of a lightly used R2400. I > >> >> agreed with Mike Wilson's caution, but not necessarily his view of > >> >> "Irrecoverably". Using Epson's print head cleaning utility is > >> >> guaranteed to use up a lot of ink, if not actually unclog the print > >> >> head. > >> >> > >> >> I like (much better) this guy's tutorial: > >> >> https://www.youtube.com/watch?v=_1hxljJhi9M > >> >> His use of aquarium pump tubing as a reservoir/sight glass is ingenious. > >> >> Also worthwhile is his formula for DIY Inkjet print head cleaner: > >> >> https://www.youtube.com/watch?v=DHUQAZFdTOM > >> >> > >> >> With these techniques in your pocket you may find a real bargain out > >> >> there, even if the printer doesn't work perfectly when you purchase > >> >> it. > >> > > >> > I can only go by my own experience. Two very expensive printers (and a > >> > cheaper > >> > one) failed due to head clogging that Epson's procedures would not clear. > >> > Having access to a large variety of chemicals, I used internet knowledge > >> > to > >> > try > >> > a number of different options. No success. Finally, for the last > >> > machine, > >> > I > >> > found a recently damaged one that had a good head. Over a week, I > >> > swapped > >> > the > >> > head only to find that Epson has the neat little trick of killing the > >> > printer if > >> > you access the head. This can only be fixed by some firmware kludge that > >> > only > >> > Epson engineers know. I couldn't find it on the internet. So I then had > >> > the > >> > choice of paying about 2/3rds of the new cost for Epson to replace the > >> > head > >> > (no > >> > nearby agent, of course) or walking away. It was one of the best walks > >> > of > >> > my > >> > life. > >> > > >> > In my ever so humble opinion, inkjet printers are the spawn of the devil > >> > and > >> > the > >> > fact that they print anything at all is nothing short of a miracle. > >> > > >> > -- > >> > PDML Pentax-Discuss Mail List > >> > [email protected] > >> > http://pdml.net/mailman/listinfo/pdml_pdml.net > >> > to UNSUBSCRIBE from the PDML, please visit the link directly above and > >> > follow the directions. > >> > >> > >> > >> -- > >> “The Earth is Art, The Photographer is only a Witness ” > >> ― Yann Arthus-Bertrand, Earth from Above > >> > >> -- > >> PDML Pentax-Discuss Mail List > >> [email protected] > >> http://pdml.net/mailman/listinfo/pdml_pdml.net > >> to UNSUBSCRIBE from the PDML, please visit the link directly above and > >> follow > >> the directions. > > > > -- > > PDML Pentax-Discuss Mail List > > [email protected] > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > to UNSUBSCRIBE from the PDML, please visit the link directly above and > > follow the directions. > > > > -- > “The Earth is Art, The Photographer is only a Witness ” > ― Yann Arthus-Bertrand, Earth from Above > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
