Good morning all!
I am trying to determine an SOP for testing FD&C incoming raw colors to ensure that our FD&C blends will not have a visual variance related to the allowable variance on the certified color specification in our finished products. Can anyone recommend a procedure using a coloremeter for testing incoming FD&Cs? Specific L.A.B. values perhaps or methods to determine them? I have come up with a number of potential options but I would like it to be a tried and true method if possible. Perhaps someone can recommend a lab service that could test total color content? We have had trouble finding a lab that offers this service however.
Thank you for your time!