FAQ: “… Was wondering – do you know of a web site or application where if CIELAB values were entered, the corresponding color would be displayed? Can I also convert from one color scale to another?”
All HunterLab instruments have fuses built into the main circuitry to protect the instrument against unusual and unexpected changes in voltage that could damage the electrical components.
FAQ: “We need to take our Agera instrument to Germany for some plant trial testing. Our machine is a US spectrophotometer 110v unit and, obviously, the power supply in Germany is 220v. The label on the back of the instrument says ‘110v-220v’, which sounds a little ambiguous to me. Do we need a voltage transformer […]
To communicate color values effectively, completely specify the 6 parameters of your measurement method and verify that your color measurement is repeatable. These are the key factors to ensure inter-instrument agreement. The best inter-instrument agreement in color measurement at multiple locations occurs when a product is measured with the same instrument model from the same […]
Haze is the scattering of light by a nearly clear specimen that results in a slightly cloudy appearance when the sample is viewed in transmission.
The Hunter Rdab opponent-color scale, developed in 1943, was an early version of the Hunter L, a, b scale. Instead of L, Rd is used to designate lightness and is identical to the CIE Y Brightness/Luminosity value. Sometimes the Rd, a, b color scale is shown as LRd, aRd, bRd.
FAQ: “One question we are a little unclear about – if you set X, Y, Z on D65/10° in the Color Data View to read back the White Tile for a calibration check, will it make the YI Yellowness Index read in D65/10°, or is it fixed to C/2°?”
Density is a measurement of how thick a film layer is on a clear or opaque substrate; colorimetry is a measurement of the perception of the color of that layer.
FAQ: ” We are currently using a 10 mm path length and read in the 0 – 50 region for APHA/Pt-Co/Hazen Color, usually in the area of 10. Would you recommend a 10 mm path length with our equipment for this application?”