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Search Publications by: Maria E. Nadal (Fed)

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Displaying 26 - 50 of 75

NIST Reference Colorimeter

May 9, 2005
Author(s)
Maria E. Nadal, Robert R. Bousquet, Gael Obein
The Optical Technology Division at the National Institute of Standards and Technology (NIST) developed a reference instrument for measuring the surface color of non-fluorescent samples at the standard measuring geometries of 0 /45 , ~0 /d, and 8 /d with

Uncertainty Analysis for Reflectance Colorimetry

June 1, 2004
Author(s)
E A. Early, Maria E. Nadal
The uncertainty associated with the quantitative description of the color of an object is often necessary for determining the acceptability of that object for its intended application. Uncertainties are also required for establishing the traceability of a

Color Measurements for Pearlescent Coatings

February 1, 2004
Author(s)
Maria E. Nadal, E A. Early
This paper describes recent developments at the National Institution of Standards and Technology in the colorimetric characterization of pearlescent coatings. The goal of this research is to develop a measurement protocol for the accurate color

Uncertainty Analysis of Reflectance Colorimetry

June 1, 2003
Author(s)
E A. Early, Maria E. Nadal
The specification of the color of an object is important, sometimes crucially, to its acceptability for an intended application. When quantitative measurements are used to determine the color of an object, an uncertainty is required to satisfy the

Optical Reflectance of Metallic Coatings: Effect of Aluminum Flake Orientation

September 1, 2002
Author(s)
Li Piin Sung, Maria E. Nadal, M E. McKnight, Egon Marx, B Laurenti
The orientation of platelet-like pigments in coatings is affected by the processing conditions resulting in appearance variations of the final product. A set of aluminum-flake pigmented coatings having different flake orientations was pre-pared using

Colorimetric Characterization of Pearlescent Coatings

January 1, 2002
Author(s)
Maria E. Nadal, Thomas A. Germer
This paper descirbes recent developments at the National Institution of Standards and Technology in the colorimetric characterization of pearlescent coatings. The goal of this research is to develop standard measurement protocols for the accurate color

Optical Reflectance of Metallic Coatings: Effect of Aluminum Flake Orientation

January 1, 2002
Author(s)
B Laurenti, Egon Marx, Maria Nadal, M E. McKnight, L Sung
The orientation of platelet-like pigments in coatings is affected by the processing conditions resulting in appearance variations of the final product. A set of aluminum-flake pigmented coatings having different flake orientations was pre-pared using

Effect of Aluminum Flake Orientation on Coating Appearance

November 1, 2001
Author(s)
Li Piin Sung, Maria E. Nadal, M E. McKnight, Egon Marx, R Dutruc-Rosset, B Laurenti
The orientation of platelet-like pigments in coatings is affected by the processing conditions resulting in appearance variations of the final product. A set of aluminum-flake pigmented coatings having different flake orientations was pre-pared using

Modeling the Appearance of Special Effect Pigment Coatings

October 1, 2001
Author(s)
Thomas A. Germer, Maria E. Nadal
Metallic and pearlescent coatings are becoming increasingly important in automotive, currency, and cosmetic applications. These coatings consist of metallic or dielectric platelets suspended in a binder, and are often applied between a pigmented underlayer

NIST Reference Goniophotometer for Specular Gloss Measurements

June 1, 2001
Author(s)
Maria E. Nadal, Ambler Thompson
The measurement of specular gloss consists of comparing the luminous reflectance from a test specimen to that from a gloss standard, under the same geometric conditions. The reference goniophotometer described here was designed and characterized to comply

Measurements and Predictions of Light Scattering by Clear Coatings

May 1, 2001
Author(s)
M E. McKnight, Theodore V. Vorburger, Egon Marx, Maria E. Nadal, P Y. Barnes, Michael A. Galler
Comparisons are made between calculations and measured angle-resolved light scattering distributions from clear dielectric isotropic epoxy coatings over a range of rms roughness conditions, resulting in strongly specular scattering characteristics