I am having some prints done of some photographs for an art exhibition, the photos are mounted and framed, and the photo is printed so there is a small visible white border around the print before the mount of 7mm at left, right and top and 14mm at the bottom.
The intention is to number and sign the print at the bottom as is typically done with limited edition prints of paintings (and I believe photographs). But because they are printed on satin paper (Canson Baryta) a normal pencil will not work, and the pens I have tried are too black.
Is there a type of pencil or a pen which gives the apperance of being pencil that will work on this type of paper.