The Platinum Palladium Print
Platinum palladium printing is a traditional photographic printmaking technique dating back to a period in photographic history that predates silver gelatin prints. The prints are exposed by UV light, and were originally exposed by the sun. The prints are created by way of "contact printing" which means the photographic negative must be as large as the final print. This limited fine art photographers until the digital age, where we can now create what are known as "digital negatives." These negatives can be printed at nearly any size and can be used to create platinum palladium prints up to 40" wide.
Platinum palladium prints are unparalleled by any modern printing technique, both in appearance and performance. These prints are favored by art collectors due to their longevity and appearance. The tonal range of platinum palladium prints are unmatched, even by modern digital inkjet printers. The final color tonality can range from warm black, to reddish brown, with a range of grays in the midtones. Pure platinum (platinotype) prints tend to have a higher contrast and cooler tones, while pure palladium (palladiotype) prints can tend to have warmer appearance with deeper blacks and softer highlights. The mixture of platinum and palladium can create a balance between the two appearances and tonalities, which is applicable to some images. Platinum and palladium prints are the most durable of all photographic processes. The platinum (and sister element palladium) element is incredibly stable against chemical reactions that may degrade the print, and is even more stable than gold.
As of January 2021, I am now offering platinum palladium prints as a service to other photographers. Click the button below to find out more information about the service and the platinum palladium prints I offer.
Coating the Emulsion
Paper is coated with a solution of platinum and palladium salts, combined with a ferric oxalate sensitizer and restrainers to add contrast if necessary. The mixture is brushed onto the paper slightly larger than the negative, which can be seen as brush strokes in the final print if not masked from light. This coating is what makes the paper light sensitive to ultraviolet light.
Exposing the Print
After the paper has reached a bone dryness, it is humidified slightly. The negative is then placed over the paper and exposed to UV light. During this process, the print can be dodged and burned to affect the tonalities in the final image. After the exposure, a "latent image" can be seen on the print.
Development
Following the exposure, the print is developed in a variety of different developers, depending on the desired outcome of the final print. The development is nearly instantaneous during the develop-out process. The print is then cleared of the sensitizer and runs through an archival wash for 25 minutes.