Blogs
Where does one find the EP (European Pharmacopoeia) Liquid Color Matching Standards?
Posted on by Ken Phillips
EP – European Pharmacopoeia Color is a visual liquid color scale used primarily in the pharmaceutical industry. It consists of 3 primary color standard solutions (yellow, red and blue) mixed with hydrochloric acid to make 5 standard color solutions – B (brown), BY (brownish-yellow), Y (yellow), GY (greenish-yellow) and R (red).
Do HunterLab sphere instruments conform to ASTM D1003?
Posted on by Ken Phillips
Yes, but note there are two different approved instrument geometries cited in the ASTM 1003 method.
How can I upgrade or install EasyMatch QC software on a new computer?
Posted on by Ken Phillips
For either a network or local PC installation, the person installing EasyMatch QC software must be a System Administrator for the PC, with software installation privileges for both the old and new computers.
How can I upgrade EasyMatch QC software on an existing computer?
Posted on by Ken Phillips
For either a network or local PC installation, the person installing EasyMatch QC software must be a System Administrator for the PC, with software installation privileges for that computer.
Is there an Internet Site for converting and displaying color values?
Posted on by Ken Phillips
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?”
What Fuse Protection is in place with HunterLab Instruments?
Posted on by Ken Phillips
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.
Can Power Supplies in HunterLab Instruments be used everywhere?
Posted on by Ken Phillips
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 […]
Optimal inter-instrument agreement and communication of color values
Posted on by Ken Phillips
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 […]
How do I measure Haze with EasyMatch QC?
Posted on by Ken Phillips
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.
How do I perform an DQ IQ OQ PQ RQ using EasyMatch QC-ER?
Posted on by Ken Phillips
What is the Hunter Rd, a, b Color Scale?
Posted on by Ken Phillips
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.