Optics: measuring and testing – By shade or color – With reflective multicolor chart or standard
Patent
1983-06-09
1985-06-18
Evans, F. L.
Optics: measuring and testing
By shade or color
With reflective multicolor chart or standard
356243, 422 55, 434 98, G01J 352
Patent
active
045238529
ABSTRACT:
An improved method for visually comparing the results of colorimetric analytical tests to a color reference standard, enabling substantially improved quantitation to be achieved for such tests, is disclosed. Also disclosed is improved apparatus, in the form of an improved color comparision reference standard, which is useful in the method. In one embodiment, the standard can comprise a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric analytical test can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which the colored reference areas are displayed. The background area has a luminance (L*) value of from about 15 to about 80, and the luminance (L*) value of any portion of the background area is within about 30 of the average luminance (L*) value of any two or more adjacent ones of the colored reference areas which are displayed against the portion of the background area.
REFERENCES:
patent: 1070891 (1913-08-01), Hochstetter
patent: 1389836 (1921-09-01), Mooney
patent: 1598899 (1926-09-01), Vogel
patent: 2074704 (1937-03-01), Osborne
patent: 2245557 (1941-06-01), Franzman
patent: 2916963 (1959-12-01), Bouman
patent: 3438737 (1969-04-01), Atkinson et al.
patent: 3529519 (1970-09-01), Mitchell
patent: 3653771 (1972-04-01), Piringer
patent: 3791933 (1974-02-01), Moyer et al.
patent: 4160646 (1979-07-01), Furutani et al.
patent: 4234313 (1980-11-01), Faulkner
patent: 4330299 (1982-05-01), Cerami
Coe Roger N.
Evans F. L.
Harringa Joel L.
Miles Laboratories Inc.
LandOfFree
Color comparison reference standard and method for using same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color comparison reference standard and method for using same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color comparison reference standard and method for using same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-978118