The use of rhodium, ruthenium, and technetium is proposed for balanced filters for silver K&agr; x rays. Rhodium and ruthenium are used to isolate the K&agr;1, ruthenium and technetium for the K&agr;2, and rhodium and technetium are used for the K&agr; doublet. General criteria are given for optimizing the intensity in terms of the transmission of one of the filters at the line of interest. The transmission of filter A (lowest atomic number) for any of the filter pairs should be about 12% for silver K&agr; x rays.