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Journeys into colour space / J. Graystone in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B3 (09/2004)
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Titre : Journeys into colour space Type de document : texte imprimé Auteurs : J. Graystone, Auteur Année de publication : 2004 Article en page(s) : p. 221-228 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants
Colorimétrie
CouleurTags : Couleur 'Origine de la couleur' 'Systèmes classement des couleurs' 'Terminologie 'Colorants : traitement et dispersion' 'Effets taille particules' 'Correspondance couleurs stabilité teintes' Index. décimale : 667.9 Revêtements et enduits Résumé : Modern cosmology underlines the complexity of space time whose full description requires multidimensions and relativity. The objective-subjective world of colour space may seem equally complex, and the continued development of colour order systems is a testimony to this. Navigation in colour or physical space requires answers to such questions as where are we now, where do we want to go, and how do we get there? Colour derived from pigments has both intrinsic and extrinsic character. As a consequence of the latter, just about every aspect of colour delivery including dispersion, dilution, reduction, drying and shearing can take the hue in a different direction within the chosen colour space. Understanding the practical implications of this is an important aspect of colour delivery with a direct bearing on comparing and optimising products or processes. Note de contenu : - Origin of colour effects
- Colour vocabulary
- Colour space and colour order systems : Colour space - Colour order systems
- Journeys in colour space : Directions in colour space
- Particle size effects : Colour movement in tinting and testing - Processing effects (shearing during dispersion) - Application shearing - Formulation factors - Instrumental colour matchingDOI : 10.1007/BF02699638 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699638.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5464
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B3 (09/2004) . - p. 221-228[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000390 - Périodique Bibliothèque principale Documentaires Disponible Colour harmony of two-colour combinations using a 3D colour configuration / Shi-Min Gong in COLORATION TECHNOLOGY, Vol. 135, N° 4 (08/2019)
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Titre : Colour harmony of two-colour combinations using a 3D colour configuration Type de document : texte imprimé Auteurs : Shi-Min Gong, Auteur ; Wen-Yuan Lee, Auteur Année de publication : 2019 Article en page(s) : p. 292-304 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couleur Tags : 'Harmonie des couleurs' 'Configuration 3D' Index. décimale : 535.6 Couleur Résumé : Over the past few years, although many studies have investigated colour harmony, most of those used the planar colour configuration, which is not in line with the design requirements of real‐life products. Therefore, this study used 11 basic colours and five types of colour scheme techniques to derive 141 colour combinations applied upon a physical 3D colour configuration to observe the phenomena of colour harmony. The results show that colour harmony on a 3D colour configuration is different from that on a planar colour configuration, and can be divided into four phenomena: (i) lightness difference was found to determine the colour harmony while achromatic colour was configured with achromatic colour; (ii) lightness sum prompted colour harmony while chromatic colour was configured with achromatic colour; (iii) lightness sum and chroma sum were found to determine colour harmony while chromatic colour was configured with chromatic colour with a two‐colour hue angle difference >90°; and (iv) lightness sum and hue difference were a determination of colour harmony while chromatic colour was configured with chromatic colour with a two‐colour hue angle difference of ≤90°. On the basis of these phenomena, this study develops a colour harmony model based on the colour parameters, most of which are derived from the addition of the colour attributes of two colours. Note de contenu : - Literature review
- Experimental
- Intra- and inter-observer variation
- The interrelationship between colour harmony and colour parameters
- Colour harmony model for colour combination on 3D colour configuration
- Comparison with existing colour harmony modelsDOI : 10.1111/cote.12405 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12405 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32832
in COLORATION TECHNOLOGY > Vol. 135, N° 4 (08/2019) . - p. 292-304[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21090 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of colour fastness and thermal migration in softened polylactic acid fabrics dyed with disperse dyes of differing hydrophobicity / Ozan Avinc in COLORATION TECHNOLOGY, Vol. 126, N° 6 (2010)
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Titre : Evaluation of colour fastness and thermal migration in softened polylactic acid fabrics dyed with disperse dyes of differing hydrophobicity Type de document : texte imprimé Auteurs : Ozan Avinc, Auteur ; Mike Wilding, Auteur ; John A. Bone, Auteur ; Duncan Phillips, Auteur ; David Farrington, Auteur Année de publication : 2010 Article en page(s) : p. 353-354 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie textile
Colorants -- Stabilité
Hydrophobie
Impression sur étoffes
Polyéthylène téréphtalate
Polylactique, AcideL'acide polylactique (anglais : polylactic acid, abrégé en PLA) est un polymère entièrement biodégradable utilisé dans l'alimentation pour l'emballage des œufs et plus récemment pour remplacer les sacs et cabas en plastiques jusqu'ici distribués dans les commerces. Il est utilisé également en chirurgie où les sutures sont réalisées avec des polymères biodégradables qui sont décomposés par réaction avec l’eau ou sous l’action d’enzymes. Il est également utilisé pour les nouveaux essais de stent biodégradable.
Le PLA peut-être obtenu à partir d'amidon de maïs, ce qui en fait la première alternative naturelle au polyéthylène (le terme de bioplastique est utilisé). En effet, l'acide polylactique est un produit résultant de la fermentation des sucres ou de l'amidon sous l'effet de bactéries synthétisant l'acide lactique. Dans un second temps, l'acide lactique est polymérisé par un nouveau procédé de fermentation, pour devenir de l'acide polylactique.
Ce procédé conduit à des polymères avec des masses molaires relativement basses. Afin de produire un acide polylactique avec des masses molaires plus élevées, l'acide polylactique produit par condensation de l'acide lactique est dépolymérisé, produisant du lactide, qui est à son tour polymérisé par ouverture de cycle.
Le PLA est donc l’un de ces polymères, dans lequel les longues molécules filiformes sont construites par la réaction d’un groupement acide et d’une molécule d’acide lactique sur le groupement hydroxyle d’une autre pour donner une jonction ester. Dans le corps, la réaction se fait en sens inverse et l’acide lactique ainsi libéré est incorporé dans le processus métabolique normal. On obtient un polymère plus résistant en utilisant l'acide glycolique, soit seul, soit combiné à l’acide lactique.Tags : 'Dianix SF' Colorant 'Stabilité thermique des couleurs' Hydrophobicité 'Ethylène téréphtalate' 'Acide polylactique' Index. décimale : 667.3 Teinture et impression des tissus Résumé : This paper addresses the relative effects of softeners having different properties and their method of application (exhaust vs pad) on the colour fastness of poly(lactic acid) fabrics dyed with a range of disperse dyes with different levels of hydrophobicity. A comparison was made with a correspondingly finished polyethylene terephthalate fabric. Possible relationships between the levels of hydrophilicity/hydrophobicity of the dye, and softener, and the colour fastness were explored. Finally, the amount of dye thermally migrated into the finish on the softened poly(lactic acid) and polyethylene terephthalate fabrics was examined in comparison with their colour fastness. Softened poly(lactic acid) fabrics dyed with CI Disperse Red 167.1 exhibited more thermal migration, and hence lower colour fastness, than the corresponding polyethylene terephthalate fabrics. Conversely, softened poly(lactic acid) fabrics dyed with Dianix Deep Red SF exhibited less thermal migration, and hence better colour fastness, than the corresponding polyethylene terephthalate fabrics. Overall, no clear relationship was found between the hydrophobic nature of the disperse dye and the hydrophobic character of the softener on the colour fastness. DOI : 10.1111/j.1478-4408.2010.00269.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00269.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10247
in COLORATION TECHNOLOGY > Vol. 126, N° 6 (2010) . - p. 353-354[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012590 - Périodique Bibliothèque principale Documentaires Disponible The role of gamut, intuition and engagement in colour management in a design context / Phil Henry in COLORATION TECHNOLOGY, Vol. 136, N° 3 (06/2020)
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Titre : The role of gamut, intuition and engagement in colour management in a design context Type de document : texte imprimé Auteurs : Phil Henry, Auteur ; Stephen Westland, Auteur Année de publication : 2020 Article en page(s) : p. 255-262 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Gestion des couleurs' 'Gamme de 'Sélection 'Mélange couleurs additif' soustractif' Intuition Engagement Conception Index. décimale : 535.6 Couleur Résumé : Colour management is ubiquitous in the digital world. However, despite the many advances in colour management over the last couple of decades, it remains an imperfect process. In the art and design community there is often a level of dissatisfaction and deep cynicism about colour management that can lead to lac of engagement with the process. This research explores colour management in a design context though three issues : the gamut issue , the intuitive issue and the engagement issue ; each relates to areas where colour management could better connect with tacit design knowhow. The work focusses on the selection of colour in a digital context since for many users this is the first touch point that they have with colour management. Psychophysical studies have been carried out in both laboratory and design-studio settings. It is shown that users can better predict the results from subtractive colour mixing than from additive colour mixing. The performance of various types of colour picker are explored and consequences for the design of user interfaces are discussed. DOI : https://doi.org/10.1111/cote.12449 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12449 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34298
in COLORATION TECHNOLOGY > Vol. 136, N° 3 (06/2020) . - p. 255-262[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21787 - Périodique Bibliothèque principale Documentaires Disponible Traditional science in pigments and recipe of painting woodcarving in medieval Assam, India / Asadulla A. Ali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
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Titre : Traditional science in pigments and recipe of painting woodcarving in medieval Assam, India Type de document : texte imprimé Auteurs : Asadulla A. Ali, Auteur ; Robin K. Dutta, Auteur Année de publication : 2023 Article en page(s) : p. 1595-1609 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antiquités (objets anciens) -- Analyse
Antiquités (objets anciens) -- Conservation et restauration
Couleur -- Analyse
Pigments
Revêtements:PeintureTags : 'Pigments traditionnels' 'Peinture traditionnelle' 'Sculptures sur bois' 'Manuscrits Sāncipat' 'Hengul-Haital' 'Analyse des couleurs' Index. décimale : 667.6 Peintures Résumé : A painting tradition of medieval Assam, popularly known as Hengul-Hāitāl, has been studied with an aim of restoring and conserving centuries-old woodcarvings and Sāncipat manuscripts for preserving in ordinary open conditions at villages and Vaishnavite monasteries. The pigments, their combinations for producing various shades and the resulting colors have been characterized using various physicochemical techniques. The study unravels some interesting traditional science, such as, using red Hengul (cinnabar), yellow Hāitāl (yellow orpiment) and blue Nīl (Indigo or Prussian blue) as primary colors to produce any desired shade, inclusion of either or both of Hengul and Hāitāl in every shade to repel fungi and insects, applying Kharimāti (a clay) as a wood-primer for better painting effects, choosing of Bael gum as a robust non-staining natural adhesive and finally varnishing with Lā (a natural lac) to protect the pigments from natural erosion and protect the woodcarving from humidity and contaminating hands touching them. The findings provide clues to develop an appropriate method of restoration of partially worn-out woodcarvings for preserving them in ordinary open conditions, based on the traditional method of preparation. Note de contenu : - MATERIALS AND METHODS : Materials - Instrumental analysis - Preparation of shades of pigments with binders - Hunter color analysis method - Measurement of hiding power
- RESULTS AND DISCUSSION : Morphological and elemental analysis - FTIR and Raman spectra - XRD analysis - Thermal analysis - Impurities in the pigments - Analysis of paints of different shades prepared from the pigments - Traditional science in the painting tradition
- Table 1 : Ratio of volumes of the pigments, binder, and water in mL mixed to prepare paints of various shades with their average (of at least four measurements) particle size measured in Hegman scale
- Table 2 : Results of Hunter color analysis of the compositions as described in Table 1 except for the binder gum which here includes both Bael gum and a starch-based commercial gum with same proportionsDOI : https://doi.org/10.1007/s11998-023-00765-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00765-8.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39974
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1595-1609[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24242 - Périodique Bibliothèque principale Documentaires Disponible Permalink