Economic Research Institute Study paper
Utah State University
Early in 1967 a dye technique for measuring the amount of protein in fluid milk was granted "official, first action approval by the Association of Analytical Chemists. Since the fluid milk conversion factor also gives excellent results in tests on finished products, manufacturers can now account for all protein purchased. The dye technique thus removes the main technical barriers to widespread adoption of systems of direct protein payments to dairy farmers.
LeBaron, A. and Gardner, D., "Protein Payments Now?" (1968). Economic Research Institute Study Papers. Paper 346.