For over 130 years it was mistakenly believed that ammonium ferric oxalate (or other double ferric oxalate) was the correct light sensitive compound to employ for printing pictorial images with palladium, platinum, and gold. Ammonium ferric oxalate lies at the heart of the process invented by Giuseppe Pizzighelli, back in the 1880s, for printing out platinum. However, Pizzighelli was wrong.
Double ferric oxalate compounds (ammonium, sodium, lithium, guanidine, etc.) can barely be used to print out any metal. Heavy hydration of paper is required, at a minimum, and consistent and reliable results are uncertain. Little wonder that many serious printers continue to develop out their platinum and palladium prints. Gold can hardly be printed at all with the double ferric oxalates, even with extraordinary paper hydration efforts. The images so printed are garish, gritty, grainy and altogether unsatisfactory for pictorial rendering.
The reader may benefit from understanding in a general sense what happens when ultraviolet light strikes a coating of ferric oxalate or any double ferric oxalate mixed with a noble metal salt. The UV light triggers a chemical reaction as a result of which the ferric iron is slowly reduced to ferrous iron. The more UV light that reaches the surface of the paper (passing through the thinner areas of a negative), the more ferric iron is converted to ferrous iron. Beyond a certain point, the ferrous iron can no longer stay in suspension and drops into the fibers of the paper. At the same time, the metal salt (gold, platinum, or palladium) is reduced to its elemental state. A molecule of ferrous iron attaches to an atom of elemental metal, no doubt the attraction of charged ions associated with the two, and together they fall into the paper fibers and form an image.
Understanding how the process works, I realized that the answer to proper print out with the noble metals lay in a fundamentally new formula, a new light-sensitive compound, one that dispensed with worrying about humidity and instead focused on getting the ferrous iron to its critical max quickly and efficiently. Given that the print process with ferric oxalate relies on the chemical conversion of iron from its ferric state to its ferrous state, I grasped I needed a formula in which I replaced ferric oxalate with a ferric-ferrous oxalate compound: ammonium ferric-ferrous oxalate (and sodium, and lithium ferric-ferrous oxalate). Ammonium ferric oxalate is just the starting point and the printer must mix up their own ammonium ferric-ferrous oxalate. Happily, the key ingredient is ascorbic acid, vitamin C.
Vitamin C reduces ammonium ferric oxalate to ammonium ferric ferrous oxalate. Add a whole lot of C to a small volume of ammonium ferric oxalate and you end up with pure ammonium ferrous oxalate (which is useless for printing). But add just the right amount of C and you can print out gold images with a range of 11 or more stops and no grain. Add a little more and you can combine gold and platinum and coax those two nobles to print out. Add even more and you can print out on dry paper pure palladium, palladium-platinum, palladium gold, and palladium-gold-platinum. No learning curve. No guess work. No waste. If you already know how to brush sensitizer onto paper, your first print will be perfect.
With ammonium ferric-ferrous oxalate, we all of us, photographers and artists, have the tool we need at last to print grainless, pictorial images in gold with a wide tonal range. And we have for the first time the ability to combine gold and platinum -- the Karytype -- to print out images that have the three-dimensional plasticity of silver gelatin prints but with much richer and delicate highlights, Dmax unattainable with palladium and platinum, and a palette of colors from neutral gray, to slate, to coral.
Forget about constructing a hydration chamber to prepare paper for printing with the noble metals. Forget about buying a hair dryer to dry just the emulsion while leaving your paper damp. Forget about heating up a steam kettle to salvage an image that doesn't print out. Forget about grainy, red gold prints with a tonal range so narrow you have to expose black and white film as if it were old Kodachrome 25 with its maximum 3:1 contrast ratio. The noble metals are unleashed, their full potential for art is realized with the double ferric-ferrous oxalates. Instead of wasting time and money learning an obsolete and often unrewarding craft, invest time and money in printing beautiful images.
Enjoy my blog on AFFO processes at richardpuckett.tumblr.com.
This print is pure gold. I scanned the 4x5 negative as a color image with no adjustments other than reducing saturation to minimize the strong blue cast my HP g4050 scanner gave it. It is otherwise not retouched and faithfully reproduces the original print. The Dmax is rather stronger in the original, the skin tones, particularly on the model's left cheek, are somewhat smoother, and the shadows on the right side of her face gentler. Even so, no other gold printing process is capable of this degree of smoothness, three-dimensional spatiality and extremely fine grain.
A quick demonstration of the Karytype (not Karyotype!) -- the first gold and platinum process ever. In this video, I mix only 1 drop of 10% ammonium platinum chloride with 3 of 10% gold chloride. You can substitute platinum for up to 40% of the gold without changing the formula. More than that and the formula becomes much like the Fannintype, my dry print out platinum process, except you only use 10% platinum (instead of the 20% to 25% platinum for the Fannintype). The paper is Arches Platine.
A quick demonstration of Palladium AFFO -- the first dry print out palladium process. Forget the six month learning curve on printing Ziatypes! The learning curve for this is about 10 minutes; the time it takes you to mess up the first one and then do the second one right. In this video, I mix 15% lithium palladium chloride (or is it potassium palladium chloride? it doesn't matter which you use!) with AFFO created by adding 8 drops of 2% ascorbic acid solution to 10 ml of ammonium ferric oxalate. Normally, I would use lithium ferric oxalate for its greater contrast, but I ran out and I have no lithium carbonate handy to mix some up fresh. The paper is Arches Platine, but Revere Platinum (300 or 145 gsm) works fine with palladium, as do Fabriano Artistico, Stonehenge Rising, and Rives BFK.
Welcome to the twenty-first century revolution in printing with the noble metals. The revolution started on August 13, 2011, with my discovery that artificially aging ammonium ferric oxalate with ascorbic acid – vitamin C – allows the artist to print out, in gold, with no development and no humidification of the paper, an image that approaches platinum in technical quality. An image with no grain, with latitude that holds details in deep shadows and highlights, and with a three-dimensional richness on a par with any other process. This revolution spread over the ensuing months to dry print out with palladium, then birthed a new hybrid process – gold and platinum together – and finally platinum, palladium-platinum, and gold-palladium.
Not only is this a revolution in aesthetics and new ways to express one's vision, it is a practical revolution as well. Any of the noble metals can be printed alone, or in any combination, in a dry print out process. Quickly, inexpensively, and reliably. Repeating a print involves nothing more than observing the image appear on the paper and stopping exposure at the same moment as the previous one.
Sir John Herschel invented the Chrysotype process in 1842. Dissatisfied with the results of the images he produced, Herschel declared gold unsuitable for photographic printing. In the 170 or so years after Herschel's experiments, several attempts have been made to coax gold into forming a continuous tone image. All have excited the imagination, few have excited the eye. Despite announcements accompanied by great fanfare and met with wild enthusiasm, the Chrysotype remained a chimera, apparently never to be seen in all its glory. Now the Texas Chrysotype lifts away the veil of grain, garish colors, weak Dmax and blown highlights that have characterized gold prints since 1842.
In 1873 William Willis was awarded a patent for the first practical Platinotype process. With Willis' success, photographers enjoyed, just over thirty years after the birth of photography, an expressive print medium that not only was permanent but also exquisite. The popularity of palladium followed decades later, when photographers adopted that metal as a less expensive alternative to platinum. in 1913, Willis patented the Satista print, a hybrid process for silver and platinum. (Exactly 100 years later, the first new alternative printing process since then was announced: my Karytype, which is a hybrid process for gold and platinum.)
The 19th century processes faded when twentieth century photographers embraced the beauty, simplicity of process, and quality of silver gelatin prints. For nearly eighty years, silver gelatin dominated photographic printing. But even as the early silver prints were starting to show mirroring and to fade, a new technology replaced them almost overnight. Photographers abandoned their enlargers and their chemicals and rushed out to buy inkjet printers. Little did it matter that their images were garish, soulless caricatures of photographic images that faded in months – it was all too easy to be seduced by effortless printing at the push of a button.
Silver gelatin's fall from grace did not entirely announce the collapse of quality of photography. As digital cameras steadily improved in dynamic range and pixel counts, it became practicable to make inkjet negatives of sufficiently high quality to contact print in 8x10, 16x20, and larger. That convergence of technologies, perhaps nudged along by the zeitgeist of photography in the early twenty-first century, awakened a new interest in printing with platinum, palladium, and even gold. Old formulas from the nineteenth century were pored over for clues to simplifying – and improving – image-making with the noble metals. Of all the new processes that were handed photographers as the twentieth century closed and the twenty first began, the Ziatype offered practicality, quality, and relative simplicity. The tray of toxic chemicals required for developing out platinum and palladium was replaced with humidification of paper. Complex metal salts – lithium palladium, gold chloride and sodium platinum – never before brought together facilitate the print out and enhance the process. Photographers who would never have used an inkjet printer for anything more than an image constituted of pigment dots began making negatives from digital files and contact printing in the noble metals.
Gold serves the palladium in the Ziatype in the role of a sort of handmaiden of hues, particularly lavender. Efforts to eliminate the palladium and leave only the gold in the process proved gold could be printed out. Interest began to rise in the possibility of the Chrysotype. In the span of a few years, two new formulas were announced, nudging the metal a little closer toward image-forming viability. Finally, the correct formula, the Texas Chrysotype, was announced. Humidity is now of concern only to printers obsessed over their smooth complexion. The formula is so simple not even a PhD in chemistry could find enough jargon to obfuscate it. Vitamin C, ammonium ferric oxalate, and gold chloride are mixed together, brushed onto dry paper, and, once the sensitizer has dried, placed in contact with a negative – film or digital – and exposed to ultraviolet light. The image that subsequently prints out fully, with no development, is all the more stunning precisely because it is capable of exhibiting smooth tones across 11 or more stops, deep blacks, excellent detail in shadows and highlights, and no grain. With the Texas Chrysotype process, gold finally takes her place between her noble sisters, palladium and platinum.
The only manual for dry print out in gold, platinum and palladium is now available! The Old Made New presents the formulas for dry print out -- no development, no humidification -- of the following seven processes:
No exotic chemicals are required to prepare sensitizers -- vitamin C, ammonium ferric oxalate, ferric oxalate and the metal salts are all that is needed for gold and palladium; platinum also requires glycerine, which is available in every pharmacy or grocery store. All chemicals can be purchased from Bostick and Sullivan in Santa Fe, New Mexico, or Artcraft Chemicals in Altamont, New York. Both companies have online sites and both are operated by friendly and helpful folk. Papers are available in art stores, from dealers such as Freestyle Photo Sales, Digital Truth, and Bostick and Sullivan. Nothing you cannot easily obtain at reasonable cost is required for these processes. Neither do you need a degree in chemistry to prepare any of the solutions, much less to understand the content of the manual.
Start printing out palladium right away. If you already have palladium chloride (lithium or potassium) and ammonium ferric oxalate, all you need is ferric oxalate (to boost contrast) and powdered vitamin C. Use Arches Platine, Revere Platinum, Rives BFK, or Clearprint vellum. View
Ziatype+: Dry Print Out Palladium in a new window.
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