Looking for a silver and black pen for signing prints
I use "paint" pens, although I haven't found a particular type that I really like. I often get them at the local art store. Then again, I haven't tried one on a metallic print yet.
Harry -- Good questions. For me, it depends a lot on the printing technique. For classic B&W I mat and typically sign the print off the printed area (you can sign the mat, but there is no guarantee it stays with the print). For color prints, which are often not matted with a border, I often sign with a gold or silver paint pen, or if the coloring works, with a black pen. For canvas, I normally use a gold or silver paint pen.
When we sell a print matted or framed, we always tape a business card and information about the print to the back. We don't do that for "plain" prints since we don't want to risk bleed-through or some damage to the print. I'm sure others have more suggestions (prints aren't that big a piece of our business), but those are some ideas.--David