Van Gieson's stain is a mixture of picric acid and acid fuchsin. It is the simplest method of differential staining of collagen and other connective tissue. It was introduced to histology by American neuropsychiatrist and pathologist Ira Van Gieson.
Other dyes
Other dyes used in connection with van Gieson staining include:
References
Van Gieson's stain Wikipedia(Text) CC BY-SA