I work in wastewater treatment, and part of what I do is labwork. We have a dye plant that discharges to one of my plants, and we are required to test for color in the effluent. The test we use is out of Standard Methods, 2120E ADMI Tristimulus Method. The sample is put into a spectrophotometer, and the final values from that are compared to charts that look a lot like logarithm charts to get final Munsell values.
I've been looking for a long time for the Bridgeman equations used to generate the Munsell values charts. No, it's not required for our permit, but, personally speaking, I would prefer a more exact number than the ones given by the charts, however close an approximation that may be. I've asked the engineers at the dye house. They don't know. I've asked the State engineers. They don't know. I've combed through every library and Internet source I've been able to find. No luck there, either.
Is there anybody on CR4 that knows the Bridgeman equations? If so, would you please share and save me from eternal frustration?
Thanks --
Dave M.