Stained glass, production methods

The general method for ruthenium tetroxide staining is to stain sections over a fresh 1% solution for about 5-30 min. This is a problem as ruthenium tetroxide solutions are quite unstable, though Trent et al [166] have frozen solutions in sealed glass containers for periods up to six months and report that ruthenium tetroxide can be prepared by oxidation of hydrated ruthenium dioxide using sodium periodate (available from Morton Thiokol, Inc., Alfa Products). The reaction, shown in the following equation [177] ... 

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