Abstract
ABSTRACTSix lots of dry cereals were chosen to develop guide lines for production line color control. Each pair were samples representing the finished product and the base product. The first pair was tan colored cubes, the second pair was red spheres and the third, orange spheroids. The samples in each pair were very similar in color by visual examination. Four instruments were tested for their ability to distinguish between the samples in each pair. A Color Eye instrument, modified for small area viewing (5 mm diam) could be used to separate the samples in each pair. Similarly, a General Electric Recording Spectrophotometer could also be used to separate the samples in each pair, but with both instruments, the mean values for each pair were close and the coefficient of variability high. Measurement of individual pieces of cereal was deemed impractical. A Hunter Color Difference Meter could also be used to separate the samples in each pair with a low coefficient of variability. An Agtron large area viewer was the most successful instrument in separating the samples in each pair. The differences in the averages between each pair were large due to the scale expansion facility, and the coefficient of variability was low. The red mode was most successful for the tan and red samples and the green mode most appropriate for the orange samples.
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