Continuation…
I’ve created three images from each negative: 1 without an coating, other with a coating of saline solution (from my sister’s first aid kit, she is a surgeon so have a lot of interesting stuff), and one with a variation of the formula presented by Joan Foncuberta in his book: “Photography Concepts and procedures. A methodological proposal”.



Still not sure of how improve this negative. I will give a try to a recommendation of France Scully Osterman.