Insight on Color Vol. 8, No. 15 Yellowness Indices Background Visually, yellowness is associated with scorching, soiling, and general product degradation by light, chemical exposure, and processing. Yellowness indices are used chiefly to quantify these types of degradation with a single value. They can be used when measuring clear, near-colorless liquids or solids in transmission and near-white, opaque solids in reflectance. Conditions for Measurement Instrumental: ...
Process Analytical Systems Application Note: On-Line Monitoring & Product Release of APHA Color with a ® ClearView db Photometer Purpose: Measurement of APHA color either on-line or in a laboratory setting using a photometer. Background: APHA is sometimes referred to as the Platinum- Cobalt (Pt/Co) or Hazen scale. Also referred to as a “yellowness index”, the APHA color scale is a common method ...
OMT SOLUTIONS TRCalc a user friendly point-and-click software application for the glass and glazing industry User Manual TRCalc User manual CONTENTS INTRODUCTION .......................................................................................................................................................................... 4 PROPERTIES CALCULATED BY TRCALC ....................................................................................................................................... 4 SPECIAL FEATURES OF TRCALC ................................................................................................................................................... 4 TRCALC MAIN DIALOG ........................................................................................................................................................... 2 TRCALC MAIN DIALOG ................................................................................................................................................................. 2 THE FILE BROWSER ....................................................................................................................................................................... 3 THE GRAPH .................................................................................................................................................................................... 3 SELECTING A SPECTRUM DATA FILE ............................................................................................................................................. 4 CORRECTING (CALIBRATING) MEASUREMENT DATA ................................................................................................................... 5 SELECTING A COLOR SYSTEM ....................................................................................................................................................... 6 YELLOWNESS ...
BENCHTOP PORTABLE ONLINE ColorFlex D25 NC LabScan XE UltraScan UltraScan Vista MiniScan MiniScan SpectraTrend EZ PRO VIS EZ (S) EZ (L) HT GEOMETRY Directional 45°/0° Diffuse d8° Sphere 0°/30° Tt/0º or Td/0º MEASUREMENT MODES Reflectance Transmission INDICES APHA ADMI ASBC/EBC Beer Color ASTM D1500 BCU-Baking Contrast Units Citrus Scores Coffee Scores Color Strength EP Opalescence European Pharmacopeia Color Japanese Pharmacopeia Color Gardner Color ...
LATEST: • Grade 2 – a reasonable white where rhodium plating is optional; • Grade 3 – an off-white where rhodium plating is White Gold Colour required. These grades are defined in terms of the Yellowness Index Defined values and can also be described in more conventional CieLAB co-ordinates as concentric areas of colour space. To aid use of these definitions, a colour chart, the ...
Specialty Film & Sheet Yellow is nice for a lemon but not for your glazing! Lexan* Thermoclear* sheet Superior resistance to outdoor weathering Lexan Thermoclear Plus sheet has 2 sides proprietary UV-protected surface, giving superior resistance to outdoor weathering. The unique protection helps to provide long- term optical quality under intensive sunlight exposure, and maintains the superior toughness of the polycarbonate material in comparison ...