A Comparison of Analytical Procedures of Ferric Chloride Etching Solution
The purpose of this exercise is to standardize the techniques
that are used to analyze ferric chloride etching solutions and to
reach a common ground for discussing the properties of etching
solutions and their relationship to the etching process.
We compared a set of procedures provided to us by PCMl as
part of a study of analytical procedures for the properties of
ferric chloride etching solutions.
We evaluated procedures received from Hunt Chemical
(Procedure I), an unknown source (Procedure 11), Gulbrandsen
Co. (Procedure III) and Dean Thayer (Procedure IV).
The analytical procedures were carried out by arrangement
with Kent Laboratories of Upton, MA.
William Lehrer, Photofabrication Engineering, Inc., and Sally K. Usher, Kent Laboratories