Microspectroscopic Investigation of Metal Soaps in Oil Paintings--a Case Study on late 19<sup>th</sup> Century Cobalt Green ((Co<sub>x</sub>Zn<sub>1-x</sub>O) Paint
Microspectroscopic Investigation of Metal Soaps in Oil Paintings--a Case Study on late 19th Century Cobalt Green ((CoxZn1-xO) Paint