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Coatings
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Visual Effects Coatings and Surfaces
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Visual Effects Coatings and Surfaces

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 20476

Special Issue Editor

Dr. Lionel Simonot

E-Mail Website
Guest Editor
Institut PPRIME, UPR CNRS 3346, université de Poitiers； Bât. SP2MI, Bd Marie et Pierre Curie, F-86962 FUTUROSCOPE CHASSENEUIL Cedex
Interests: light scattering; optics; color; surface plasmon resonance; nanoparticles; nanocomposites

Special Issue Information

Dear Colleagues,

I propose this Special Issue on visual effect coatings, which cover many application areas. These effects can concern the different attributes of appearance: color, but also gloss, texture, and translucency.

A wide range of coating types and scales can be considered:

  • Nanocomposite including plasmonic layers;
  • Interferential layers;
  • Structured coatings;
  • Turbid medium coatings;
  • Paint, ink, plastic coatings;
  • Photoluminescent films.

Contributions from your teams would be an opportunity for all of us to draw research activity on coatings in the material appearance community:

  • On the manufacture of these coatings;
  • On measurements of their optical properties;
  • On prediction models and appearance simulations;
  • On the virtual rendering of these coatings.

This Special Issue is the initiative of the GDR APPAMAT, a French research group on the appearance of materials (http://gdr-appamat.cnrs.fr/).

Dr. Lionel Simonot
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

  • Material appearance
  • Visual effects
  • Optical properties

Published Papers (4 papers)

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Research

17 pages, 1069 KiB  
Article
Impact of a Transparent Coating on the Reflectance of a Line Halftone Pattern
by Fanny Dailliez, Mathieu Hébert, Anne Blayo, Lionel Chagas and Thierry Fournel
Coatings 2021, 11(12), 1465; https://doi.org/10.3390/coatings11121465 - 29 Nov 2021
Cited by 4 | Viewed by 1993
Abstract
Many prints are coated to increase their resistance or to enhance their appearance. Applying a smooth transparent layer on a print darkens and saturates its color, an easily observable effect which can be predicted in order to obtain better color management of coated [...] Read more.
Many prints are coated to increase their resistance or to enhance their appearance. Applying a smooth transparent layer on a print darkens and saturates its color, an easily observable effect which can be predicted in order to obtain better color management of coated surfaces and ink saving. A model was thus developed which describes the reflectance of a single-ink line halftone in optical contact with a transparent smooth coating. It is based on the peculiar way light diffuses inside the coating layer, a phenomenon called the “halo effect”. The model was compared to two experiments conducted at different scales where line halftones were coated with different coating thicknesses. The experiments enabled us to identify and measure the darkening effect caused by a coating layer, and validated the model. Full article
(This article belongs to the Special Issue Visual Effects Coatings and Surfaces)
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22 pages, 9564 KiB  
Article
Gloss, Light Reflection and Iridescence in Ceramic Tile Enamels Containing ZrO2 and ZnO
by Víctor Echarri-Iribarren and Carlos Rizo-Maestre
Coatings 2020, 10(9), 854; https://doi.org/10.3390/coatings10090854 - 1 Sep 2020
Cited by 4 | Viewed by 6225
Abstract
Ceramic claddings on building facades not only present functional qualities and good resistance; they also add value to the architecture due to their qualities of light reflection, gloss and iridescence. The colour ranges produced by some enamel application techniques can vary widely. They [...] Read more.
Ceramic claddings on building facades not only present functional qualities and good resistance; they also add value to the architecture due to their qualities of light reflection, gloss and iridescence. The colour ranges produced by some enamel application techniques can vary widely. They change depending on one’s angle of vision and movement, colours in the surroundings, sunlight and their angle of incidence. In addition, the iridescent-pearl effect produced by light diffraction can lead to beautiful goniochromatic colours. This study analyses the production of square tiles of stoneware manufactured by extrusion, and their application to the Faculty of Education of the University of Alicante (FEUA) (Spain). Applying an enamel containing zirconium silicate ZrSiO4 and other metals such as Zn and Al produces iridescence-like effects. The physical-chemical properties of enamel and gloss values were characterised. A colorimetric characterisation was conducted by evaluating goniochromatic or iridescent colours, measuring the light’s spectral radiance factor, and comparing these results with other ceramic tiles of marked iridescent effects, with the presence of a final layer of anatase TiO2 enamel. Full article
(This article belongs to the Special Issue Visual Effects Coatings and Surfaces)
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12 pages, 3048 KiB  
Article
Influence of Some Flexographic Printing Process Conditions on the Optical Density and Tonal Value Increase of Overprinted Plastic Films
by Zuzanna Żołek-Tryznowska, Maciej Rombel, Georgij Petriaszwili, Sandra Dedijer and Nemanja Kašiković
Coatings 2020, 10(9), 816; https://doi.org/10.3390/coatings10090816 - 24 Aug 2020
Cited by 14 | Viewed by 4834
Abstract
The print quality of prints performed with flexographic printing technology is influenced by various parameters such as viscosity of the printing inks, printing substrates, plates, anilox rolls, etc. The aim of this work is to analyze the influence of ink viscosity, printing plate [...] Read more.
The print quality of prints performed with flexographic printing technology is influenced by various parameters such as viscosity of the printing inks, printing substrates, plates, anilox rolls, etc. The aim of this work is to analyze the influence of ink viscosity, printing plate and printing base on selected properties of print quality, such as optical density of full tone area and the increase of tonal value (TVI). Additionally, the printed dots on 5, 15, 30, 50 and 75% of half tone area were investigated using digital microscopy. The least square fitting method in a matrix form was successfully used in order to confirm the influence of printing process parameters on print quality. The results obtained reveal the significant influence of the printing plate and printing substrate characteristics and the lesser influence of printing ink viscosity for 40–100% coverage area. The values of the optical densities of full tone areas are mainly influenced by the properties of the printing plate and the printing base. Furthermore, the optical density decreases when the value of flow time decreases, which is related to the lower thickness of dried ink film. The TVI on light tones (0 to 20%) is mainly influenced by the ink viscosity. Full article
(This article belongs to the Special Issue Visual Effects Coatings and Surfaces)
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12 pages, 2902 KiB  
Article
Femtosecond Laser-Induced Damage Characterization of Multilayer Dielectric Coatings
by Praveen Kumar Velpula, Daniel Kramer and Bedrich Rus
Coatings 2020, 10(6), 603; https://doi.org/10.3390/coatings10060603 - 26 Jun 2020
Cited by 24 | Viewed by 6490
Abstract
The laser-induced damage threshold (LIDT) of optical components is one of the major constraints in developing high-power ultrafast laser systems. Multi-layer dielectric (MLD) coatings-based optical components are key parts of high-power laser systems because of their high damage resistance. Therefore, understanding and characterizing [...] Read more.
The laser-induced damage threshold (LIDT) of optical components is one of the major constraints in developing high-power ultrafast laser systems. Multi-layer dielectric (MLD) coatings-based optical components are key parts of high-power laser systems because of their high damage resistance. Therefore, understanding and characterizing the laser-induced damage of MLD coatings are of paramount importance for developing ultrahigh-intensity laser systems. In this article, we overview the possible femtosecond laser damage mechanisms through damage morphologies in various MLD optical coatings tested in our facility. To evaluate the major contributions to the coating failure, different LIDT test methods (R-on-1, ISO S-on-1 and Raster Scan) were carried out for a high reflective hybrid Ta2O5/HfO2/SiO2 MLD mirror coating at a pulse duration of 37 fs. Different LIDT test methods were compared due to the fact that each test method exposes the different underlying damage mechanisms. For instance, the ISO S-on-1 test at a higher number of laser pulses can bring out the fatigue effects, whereas the Raster Scan method can reveal the non-uniform defect clusters in the optical coating. The measured LIDT values on the sample surface for the tested coating in three test methods are 1.1 J/cm2 (R-on-1), 0.9 J/cm2 (100k-on-1) and 0.6 J/cm2 (Raster Scan) at an angle of incidence of 45 deg. The presented results reveal that the performance of the tested sample is limited by coating defects rather than fatigue effects. Hence, the Raster Scan method is found to be most accurate for the tested coating in evaluating the damage threshold for practical applications. Importantly, this study demonstrates that the testing of different LIDT test protocols is necessary in femtosecond regime to assess the key mechanisms to the coating failure. Full article
(This article belongs to the Special Issue Visual Effects Coatings and Surfaces)
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