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.