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Coatings
Special Issues
Visual Appearance of Transportation Coatings
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Visual Appearance of Transportation Coatings

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (15 July 2020) | Viewed by 6571

Special Issue Editor

Dr. Francisco Verdu

E-Mail Website
Guest Editor
Global Innovation Center, Axalta Coating Systems, 1050 Constitution Avenue, Philadelphia, PA 19112, USA
Interests: color science and technology; visual appearance of materials; pigments; coatings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue on “Visual Appearance of Transportation Coatings”. The integral performance of any coating technology for any future and current vehicle (car, airplane, train, ship, etc.), both for interior and exterior systems, is a complex balance involving a hybrid interdisciplinary multiscale approach from nano and micro to perceptual levels of the light–matter–brain interaction, and vice versa. In the automotive sector, but easily implementable and adjustable to other transportation markets, the integral quality of coatings for metal and plastic substrates is highly demanded due to very dynamic market vectors such as mobility, digital marketing, new uses, etc., without losing the right balance between design, aesthetics, engineering, and functionality (safety, resistance, detectability, conspicuity, perceptual quality, etc.).

In particular, the topics of interest include but are not limited to:

  • Special-effect and functional pigments, even new structural coloration approaches;
  • Coating ingredients for different functional purposes;
  • Innovations in coating processes and technologies (sublayers, devices, etc.) for current and future vehicles, both in their exterior and interior systems;
  • Characterization methods for functional coatings (i.e., for LiDAR, RADAR ranges, etc.);
  • Coating formulation models;
  • Optical instrumentation for assuring the visual and surface appearance quality (BRDF, translucency, color, gloss, waviness, DOI, sparkle, graininess, harmony, etc.);
  • Visual and instrumental correlation models and methods;
  • Digital rendering techniques for improving the perceptual fidelity of the complex visual appearance of vehicle coatings;
  • Special vehicles.

Dr. Francisco Verdu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Pigments
  • Additives
  • Coating systems
  • Functional coatings
  • Vehicles
  • Instrumentation for visual appearance
  • Digital simulation
  • Multiscale approach

Published Papers (2 papers)

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Research

15 pages, 3303 KiB  
Article
Texture Evaluation of Automotive Coatings by Means of a Gonio-Hyperspectral Imaging System Based on Light-Emitting Diodes
by Francisco J. Burgos-Fernández, Jaume Pujol, Esther Perales, Francisco M. Martínez-Verdú and Meritxell Vilaseca
Coatings 2020, 10(4), 320; https://doi.org/10.3390/coatings10040320 - 27 Mar 2020
Cited by 2 | Viewed by 3173
Abstract
Sparkle and graininess are textural effects that appear as intrinsic spatial features of coatings containing goniochromatic pigments, whereas others such as mottling are undesired outcomes. In this study, we present new methods for the evaluation of sparkle, graininess and mottling of automotive coatings [...] Read more.
Sparkle and graininess are textural effects that appear as intrinsic spatial features of coatings containing goniochromatic pigments, whereas others such as mottling are undesired outcomes. In this study, we present new methods for the evaluation of sparkle, graininess and mottling of automotive coatings through images acquired with a novel gonio-hyperspectral imaging system based on light-emitting diodes with extended spectral sensitivity beyond the visible range (368–1309 nm). A novel analysis of sparkle that considered the amount of sparkling spots was used. Graininess was quantified through a novel statistical descriptor based on the energy descriptor computed from the histogram. A new index was proposed for an enhanced detection of mottling based on the analysis of striping, which was better observed and quantified in the infrared range. Spectral assessments showed a strong relationship with color and spectral reflectance for graininess and mottling. In conclusion, the results showed that these new spatial and spectral methods are a suitable, alternative and potential approach for the assessment of these textural features. Full article
(This article belongs to the Special Issue Visual Appearance of Transportation Coatings)
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10 pages, 2783 KiB  
Article
Evaluating the Graininess Attribute by Visual Scaling for Coatings with Special-Effect Pigments
by Esther Perales, Bàrbara Micó-Vicent, Khalil Huraibat and Valentín Viqueira
Coatings 2020, 10(4), 316; https://doi.org/10.3390/coatings10040316 - 26 Mar 2020
Cited by 3 | Viewed by 3054
Abstract
In our society, objects’ visual appearance is an essential factor because it allows us to recognize and differentiate one object from another. In different industrial sectors like cosmetics, textiles and automotive, special-effect pigments are largely used to achieve attractive visual features. These pigments [...] Read more.
In our society, objects’ visual appearance is an essential factor because it allows us to recognize and differentiate one object from another. In different industrial sectors like cosmetics, textiles and automotive, special-effect pigments are largely used to achieve attractive visual features. These pigments provide a color change with viewing and illumination direction, and visually provide texture. Depending on a finish’s properties, and also on the viewing and illumination conditions, coatings exhibit sparkle or a graininess-like texture. Currently, not many scientific works on the visual perception of these texture effects can be found in the literature. In addition, choice of experimental method can influence the measurement scale obtained from visual data. For this reason, the purpose of this work was to analyze graininess visual scaling constructed by two different psychophysical methods. The experimental design was based on the rank-order and paired-comparison methods. The data analysis was conducted by following the law of comparative judgments to obtain a visual scale of the graininess attribute to compare it to instrumental data. A good correlation appeared between both magnitudes with a correlation coefficient close to 0.9. Both methods provided useful results with a reasonable correspondence between them, which ensures that data can be considered reliable, while the visual obtained scale can act as a good graininess scale perceived by the human visual system. Full article
(This article belongs to the Special Issue Visual Appearance of Transportation Coatings)
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