photography – Page 10 – Koraks tinkers

Baby steps – enter the torture test

No, I have not yet given up! In fact, I’ve been making some progress on the color carbon transfer front. Last time, I made some cyan, magenta and yellow tissue with my newly acquired paints. Only five 4×5″ sheets per color, which is ample for some initial testing. This testing is underway, results so far are promising, and there’s even some progress on the digital negatives front!

All ye who enter here, abandon all hope

I mean, really, that title feels appropriate because I’ve started work on something that’s just extremely unlikely to work out well. Let’s face it – carbon transfer is challenging enough to begin with. Even I know that. Let alone doing it in color. Yes, you read that right: I must’ve gone mad. Carbon transfer, and not just black, but also C…M…and Y. It’s going to be either a long journey, or a frustrating one, or both. Let’s see.

A litany of woes – digital inkjet negatives and a note on dot gain mottling

I’ve sworn many times to myself that I’d steer clear of digital negatives if at all possible. Really. It’s not out of a lack of familiarity with them. Quite the opposite. I must have printed hundreds upon hundreds of them. They gave me maybe a handful decent prints, virtually all of them cyanotypes. But sometimes, there is virtually no choice but to go there…

Double transfer: going once, going twice

Up to now, I’ve only been doing single transfer carbon prints. Perfectly fine, but how about doing that other version, the double transfer? I ran a failed experiment a few weeks ago using Yupo as the temporary support. Yeah…that doesn’t work. But then I picked up a magic, very special material that did work…

Sickly colors – the crossover issue

I like to print color RA4. That’s no secret. And I like to tinker. I’m not alone in this, and as a result, working with color film and printing color RA4 pops up regularly in one way or another on the photo forums. One issue that often meshes into technical discussions on ‘analog color’ is that of color crossover. Some people immediately ‘get it’, probably because they have experience looking at and analyzing color crossover. Others struggle with the topic and don’t know exactly what to look for. In this post, I’m going to try and illustrate the issue through some (digital!) mockups.

Some small prints and a note on Fomapan 200

Yesterday I made some prints. Small ones. Firstly, because I like small prints. Secondly, I had made tissue last week and wanted to try it out. Thirdly, I had these negatives sitting here and they weren’t particularly suited for what they were intended to do, so I gave it a shot with carbon transfer. When life gives you lemons, eh? Well, this lemon here I grew all by myself!

The Big Ugly, part 4: (im)perfect present

Here we are, and this is Now. So far, I have written about the two generations of problematic and/or quasi-successful color enlarger light sources I’ve made and the lessons I’ve learned along the way. But all that is in the past. This blog is about the current, 3rd generation of the LED color light source for my (t)rusty Durst 138. It incorporates most of the lessons I learned along the way – and brought me some new ones, no doubt.

The Big Ugly, part 3: proper SMD LEDs, but no cigar (?)

In the previous part of this series, I told about the lessons I learned by trying to use a single RGB COB LED as a light source for both RA4 and B&W enlarging. I took those lessons and gave it another go, this time using a fundamentally different approach. As the title suggests, no cigar yet – although this isn’t really accurate. The second generation device I built was actually used for a year or two before I was sufficiently annoyed by its shortcomings to replace it. So the second generation actually did work – albeit with some caveats.

The Big Ugly, part 2: the RGB COB LED approach to color enlarging

Previously, I explained why I thought I needed a color light source and in general terms what it should be capable of. I also highlighted that it’s not so much a project with a clearly defined end (or at least, that hasn’t materialized yet), but more of a journey that continues into the present, and probably future as well. In this part, I’ll go through the phases this project has gone through. That is to say, there are really three distinct generations of the device I’ve built, and each has taught me different lessons. Before going into some details of the current (and 3rd) rendition, I’ll try to go through each generation and explain what it was/is and what its main caveats were (especially generations 1 & 2). Let’s start with the first generation I built.

The Big Ugly, or building a LED color printing light source. Part 1: the beginnings

Previously, I bashed compound/integrated RGB LEDs such as RGB COB LEDs for the application of a color enlarger for RA4 prints. That was basically a lesson learned the hard way when building a LED-based color enlarger light source. In this series, because one post is probably not going to be enough, I’ll highlight some aspects of the system I’ve built. Or I should say: I’ve built so far, because it’s really just a prototype that will likely never be really finished. Hence the title, The Big Ugly. Because there’s one thing it isn’t, and that’s beautiful. But hey, it works! Sort of. Most of the time. Within reasonable limits. If I’m careful.