Reflectance to Status A Density; How to convert?

[greif]

I have calibration data for some 0/45 reflectance standards which is in spectral format of %R in 10nm increments. I need to check the accuracy of reflection densitometers which read Status A density (V,R,G,B).
What is the proper way to convert the spectral reflectances to density?
Thanks,
GR

 

[Andy Resnick]

It doesn't look very compact, but it seems to be a well-posed problem:

http://books.google.com/books?id=CzAbJrLin_AC&pg=PA393&lpg=PA393&dq=%22Status+A+density%22&source=bl&ots=32xXUFXt5b&sig=RW8FvhaTqO4ZVcIf51y7EqN5Y9Q&hl=en&ei=PBDJScecGoK8M7qcxecD&sa=X&oi=book_result&resnum=3&ct=result

(Page 393). You will also have to convert your spectral data into an (RGB) format, which is also not simple but well-posed.