Jon Cone asked Arnold Gassan to make him the definitive short-bath Selenium toned print on his favorite Ilford fiber based paper. That print was used for the *ab values to formulate Selenium K7 inks. We actually produced a software for our chemist that would allow us to achieve the match during formulation. On this page you can find all of our Selenium products. Use the Product Filters on the left to narrow the list to exactly what you need. This ink is a legacy product that we are formulating in very small batches.