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Ajouter le résultat dans votre panier Affiner la rechercheColor and appearance : I / Zeno W. Wicks in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 917 (06/2001)
Titre : Color and appearance : I Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 2001 Article en page(s) : p. 49-56 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture Propriété optique Feuil Couleur Aspect Observation visuelle Source lumineuse Contretypage couleur Index. décimale : 667.9 Revêtements et enduits Résumé : Color and the interrelated topic of gloss are important to the decorative aspects of the use of coatings and, sometimes, to the functional aspects of their use. We have all dealt with color since we were babies, but most people have little understanding of color. Many technical people think of it as an aspect of physics dealing with the distribution of visible light. While that is a factor, color is a psychophysical phenomenon. The difficulty of understanding color can be seen by considering the most rigorous definition of color that has been prepared: Color is that characteristic of light by which an observer may distinguish between two structure-free fields of view of the same size and shape. In effect, it says that color is what is left to distinguish between two objects when all the other variables are removed. Not a very satisfying definition. Color has three components: an observer, a light source, and an object. (The single exception is when the light source is the object being viewed.) There is no color on an uninhabited island. This is not just a semantic statement; color requires an observer. There is no color in the absence of light; in a completely darkened room there is no color, not because you cannot see it, but because it is not there. There must be an object; if you look out the window of a spaceship without looking at a planet or star, there is no color-there is an observer, there is light, but there is no object. Another major factor affecting appearance is surface roughness. If a surface is very smooth, it has a high gloss; if it is rough on a scale below the ability of the eye to resolve the roughness, it has a low gloss. If, however, the roughness can be resolved visually, a film may exhibit brush marks, orange peel, texture, and so forth. Furthermore, there can be a combination of small scale and larger scale roughness, so films can, for example, have a low gloss and brush marks or high gloss and orange peel. The eye can resolve irregularities in surface smoothness of approximately 25 mm, depending on the distance from the object. Adding to the complications, color and gloss interact, changing either changes the other. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5748
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 917 (06/2001) . - p. 49-56[article]Réservation
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Titre : Color and appearance : II Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 2001 Article en page(s) : p. 73-81 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture Propriété optique Feuil Couleur Aspect Observation visuelle Source lumineuse Contretypage couleur Index. décimale : 667.9 Revêtements et enduits Résumé : Color and the interrelated topic of gloss are important to the decorative aspects of the use of coatings and, sometimes, to the functional aspects of their use. We have all dealt with color since we were babies, but most people have little understanding of color. Many technical people think of it as an aspect of physics dealing with the distribution of visible light. While that is a factor, color is a psychophysical phenomenon. The difficulty of understanding color can be seen by considering the most rigorous definition of color that has been prepared: Color is that characteristic of light by which an observer may distinguish between two structure-free fields of view of the same size and shape. In effect, it says that color is what is left to distinguish between two objects when all the other variables are removed. Not a very satisfying definition. Color has three components: an observer, a light source, and an object. (The single exception is when the light source is the object being viewed.) There is no color on an uninhabited island. This is not just a semantic statement; color requires an observer. There is no color in the absence of light; in a completely darkened room there is no color, not because you cannot see it, but because it is not there. There must be an object; if you look out the window of a spaceship without looking at a planet or star, there is no color-there is an observer, there is light, but there is no object. Another major factor affecting appearance is surface roughness. If a surface is very smooth, it has a high gloss; if it is rough on a scale below the ability of the eye to resolve the roughness, it has a low gloss. If, however, the roughness can be resolved visually, a film may exhibit brush marks, orange peel, texture, and so forth. Furthermore, there can be a combination of small scale and larger scale roughness, so films can, for example, have a low gloss and brush marks or high gloss and orange peel. The eye can resolve irregularities in surface smoothness of approximately 25 mm, depending on the distance from the object. Adding to the complications, color and gloss interact, changing either changes the other. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5741
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 918 (07/2001) . - p. 73-81[article]Réservation
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Titre : Color and appearance : III Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 2001 Article en page(s) : p. 83-88 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couleur
Photométrie
Revêtements décoratifs:Peinture décorativeIndex. décimale : 667.9 Revêtements et enduits Résumé : Color and the interrelated topic of gloss are important to the decorative aspects of the use of coatings and, sometimes, to the functional aspects of their use. We have all dealt with color since we were babies, but most people have little understanding of color. Many technical people think of it as an aspect of physics dealing with the distribution of visible light. While that is a factor, color is a psychophysical phenomenon. The difficulty of understanding color can be seen by considering the most rigorous definition of color that has been prepared: Color is that characteristic of light by which an observer may distinguish between two structure-free fields of view of the same size and shape. In effect, it says that color is what is left to distinguish between two objects when all the other variables are removed. Not a very satisfying definition.
Color has three components: an observer, a light source, and an object. (The single exception is when the tight source is the object being viewed.) There is no color on an uninhabited island. This is not just a semantic statement; color requires an observer. There is no color in the absence of light; in a completely darkened room there is no color, not because you cannot see it, but because it is not there. There must be an object; if you look out the window of a spaceship without looking at a planet or star, there is no color--there is an observer, there is light, but there is no object.
Another major factor affecting appearance is surface roughness. If a surface is very smooth, it has a high gloss; if it is rough on a scale below the ability of the eye to resolve the roughness, it has a low gloss. If, however, the roughness can be resolved visually, a film may exhibit brush marks, orange peel, texture, and so forth. Furthermore, there can be a combination of small scale and larger scale roughness, so films can, for example, have a low gloss and brush marks or high gloss and orange peel. The eye can resolve irregularities in surface smoothness of approximately 25 mm, depending on the distance from the object. Adding to the complications, color and gloss interact, changing either changes the other.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5747
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 919 (08/2001) . - p. 83-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001227 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Exterior durability : I Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 1999 Article en page(s) : p. 53-55 Note générale : bibliogr. Langues : Américain (ame) Catégories : Durée de vie (Ingénierie)
Photo-oxydation
Résistance aux conditions climatiques
Revêtements
Revêtements -- DétériorationIndex. décimale : 667.9 Revêtements et enduits Résumé : Exterior durability of coatings refers to their resistance to change during outdoor exposure; such changes include changes of modulus, loss of strength, embrittlement, discoloration, loss of adhesion, chalking, loss of gloss, and environmental etching. Thus, both aesthetic and functional properties are involved. The terms outdoor durability and weatherability are also used. The most common chemical processes leading to degradation of coatings are photoinitiated oxidation and hydrolysis resulting from exposure to sunlight, air, and water. These processes are interrelated, including enhanced photoxidative degradation in high humidity and enhanced hydrolytic degradation during photoexposure. Furthermore, both processes are accelerated by higher temperatures. Hydrolytic degradation may be enhanced by exposure to acid, as from acid rain. Other atmospheric degradants include ozone and oxides of nitrogen and sulfur. Changes in temperature and humidity may result in cracking, which arises from the expansion and contraction of coatings or substrates. Rates at which these processes occur vary, depending on exposure site(s), time of year, coating composition, and substrate. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17814
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 888 (01/1999) . - p. 53-55[article]Réservation
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Titre : Exterior Durability : II Type de document : texte imprimé Auteurs : Zeno W. Wicks, Auteur ; Frank N. Jones, Auteur ; S. Peter Pappas, Auteur Année de publication : 1999 Article en page(s) : p. 61-69 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Matériau revêtement' Peinture Durabilité Feuil 'Exposition intempérie' 'Résistance 'Dégradation photochimique' Adjuvant 'Absorbant UV' Antioxydant Amine Pigment Liant 'Polymère chlore' Hydrolyse 'Article synthèse' Index. décimale : 667.9 Revêtements et enduits Résumé : Exterior durability of coatings refers to their resistance to change during outdoor exposure; such changes include changes of modulus, loss of strength, embrittlement, discoloration, loss of adhesion, chalking, loss of gloss, and environmental etching. Thus, both aesthetic and functional properties are involved. The terms outdoor durability and weatherability are also used. This series examines exterior durability, focusing on the most common chemical processes leading to degradation of coatings-photoinitiated oxidation and hydrolysis resulting from exposure to sunlight, air, and water. These processes are interrelated, including enhanced photoxidative degradation in high humidity and enhanced hydrolytic degradation during photoexposure. Furthermore, both processes are accelerated by higher temperatures. Hydrolytic degradation may be enhanced by exposure to acid, as from acid rain. Other atmospheric degradants include ozone and oxides of nitrogen and sulfur. Changes in temperature and humidity may result in cracking, which arises from the expansion and contraction of coatings or substrates. Rates at which these processes occur vary, depending on exposure site(s), time of year, coating composition, and substrate. Note de contenu : - PHOTOSTABILIZATION : UV absorbers and excited state quenchers - antioxidants - Hindered amine light stabilizers - Pigmentation effects
- DEGRADATION OF CHLORINATED RESINS
- HYDROLYTIC DEGRADATIONPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17831
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 889 (02/1999) . - p. 61-69[article]Réservation
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PermalinkUV curing : science and technology - Volume II / S. Peter Pappas / Norwalk - Connecticut [United States] : Technology marketing corporation (1985)
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