Review Of Which Colors Of Light Does The Cobalt Blue Glass Transmit References. Cobalt glass plates are used as an optical filter in flame tests to filter out the undesired strong yellow light emitted by traces of sodium, and expand the ability to see violet and blue hues, [2] similar to didymium glass.web A flame test is an experiment to identify the presence of various metallic ion in the solution.

Cobalt blue color information (hex code #0047ab) diving deeper into the technical details of cobalt blue, we find its hex code to be #0047ab. What is responsible for the colors during a flame test? Which color glass bottle is the best to protect my light sensitive product, amber vs.