What are two things selenium toning does to paper?
First, Selenium imparts a bluish-purple to brick-red tone to prints. How much and what kind of color shift you experience depends on dilution, immersion time and brand of paper. It is great for serendipitous toning, but if you want precision, test it thoroughly. Second, Selenium toning is more stable than silver halide. That means the use of selenium, even in a heavily diluted form, increases the print’s archival stability.
