Recent content by Fraunhofer

Just wanted to also report that I got two kits Pyrocat HD in water from the Photographer's formulary that did not work, i.e. failed a clip test.

For me dimple and sand works really well, using brass. You can see under a microscope that I get nice round holes with a sharp edge. Also can use the microscope to measure hole diameter... with some trial and error you do get a very good "lens". I also want to add: precision control of all...

understood, we got a printer to print family photos from phones and of course, I had to play with digital negatives. But I agree, the question is how much time do you want in front of a computer versus playing in the darkroom.

Iron in the water could be another reason, I sometimes got very stubborn dark spots after sepia toning...

Resistance is futile. Some ink jet printers are practically free if you get the right deal, ink is not of course :)

Pd/Pt is more sensitive than cyanotype, so I would avoid day light. Incandescent lights would be best.

Imagemagick on linux can do stuff like that quite well. Probably also can be made to run on Mac. Not a direct answer, but I had good experience with batch processing all sorts of images.

Alibaba

@douwe and others who built UV enlargers: how do you deal with internal stray light? Black paint? Or?

Ethan, a hybrid enlarger will be much closer in efficiency to a diffusion enlarger than to a condensor enlarge. The key quantity is the emittance of your light source. Emittance being the product of the area of the light source times the solid angle it emits into. It sets a limit to how...

Here it goes: First real print from 6x6 negative, enlarged to 10x10 inches. The sensitizer is old and has some fog/clearing issue and the coating was sloppy (I just wanted to see the enlarger work) As far as focusing goes, I used white printer paper since as @douwe explained in his podcast...

Yesterday, I did my first full systems test of a Douwe-style enlarger. Thanks @douwe for guidance in getting the right parts. It is indeed a very efficient design, 40W electrical power give me about 4 times the exposure time I need for contact printing in my 360W fluorescent setup. The LED...

Jason your dry plates are featured in an article in a major German newspaper today https://www.faz.net/aktuell/technik-motor/technik/plattenkamera-im-trend-worauf-man-achten-sollte-17476513.html

I could not agree more. I have tried many possible permutations of paper, substrates (glass, chrome, lexan), glycerin, lots of pressure, no pressure, under water, hot water, print driers, etc ... to no avail. I get nice gloss but always with a few flaws. I would assume that indeed the emulsions...

Dust. I gave up on ferrotyping pretty much because I could not get rid of it. I have a relatively high humidity dark room and no dust issues in any other part of the process. Seems very fine dust can cause this.