Colour tolerance for liquid coatings / Chiara Battaglia in SURFACE COATINGS INTERNATIONAL, Vol. 103.4 (07-08/2020)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 103.4 (07-08/2020) . - p. 204-207 Titre : Colour tolerance for liquid coatings Type de document : texte imprimé Auteurs : Chiara Battaglia, Auteur ; Long Lin, Auteur Année de publication : 2020 Article en page(s) : p. 204-207 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Evaluation Formulation (Génie chimique) Mesure Revêtements organiques Rouge (couleur) Vert vision des couleurs Index. décimale : 667.9 Revêtements et enduits Résumé : Ensuring colour consistency between the standard and a batch is a fundamental task in coloured goods manufacturing, which is achieved through the colour matching evaluation. For this purpose, the determination of acceptable tolerances is essential to allow a clear and accurate colour communication and to avoid customer complaints. The study reported in this paper attempted to identify a reliable method to define colour tolerance limits. One of the limits of every colour representation model is that a Euclidean global colour space cannot be uniform at the saure time in terms of both hue and chroma differences. Additionally, a tolerance measure based only on the AE value does not take into account that this difference could be due to variations along a single or multiple coordinates at once'. As a consequence, there is, by necessity, an unsatisfactory correlation between instrumental (AE) and visual (AV) tolerances. The most accurate representation of the limits of colour perception in the CIE colour space has the shape of an ellipsoid, defined as: "the standard deviation of the boundaries around a colour target (centre point of the ellipsoids) on the CIE colour space, where all the colours within are indistinguishable to the average human eye". Note de contenu : - MATERIALS - METHODOLOGY : Instrumental measurements - Visual assessment - RESULTS AND DISCUSSION : Visual and instrumental data correlation - Fig. 1 : Tolerance ellipsoids in the CIELab colour space - Fig. 2 : Colour variations of the green low chroma centre along the axis of the colour space - Fig. 3 : Colour variations of the bright orange chroma centre along the axis of the colour space - Table 1 : Pigments content of the standards - Table 2 : Green batches formulations (percentage by weight of the coating sample) - Table 3 : Orange batches formulations (percentage by weight of the coating sample) En ligne : https://drive.google.com/file/d/1n163Y6uANDRwjzvcDGcGTppKqlk5NTQE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34429 [article]

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High electrical conductivity waterborne inks for textile printing / Muhammad Ali in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1337-1349 Titre : High electrical conductivity waterborne inks for textile printing Type de document : texte imprimé Auteurs : Muhammad Ali, Auteur ; Long Lin, Auteur ; D. Cartridge, Auteur Année de publication : 2019 Article en page(s) : p. 1337-1349 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Conduction électrique Dispersions et suspensions Encre d'imprimerie Encre en phase aqueuse Essais (technologie) Impression sur étoffes Liants Noir de carbone Pigments Textiles et tissus à usages techniques Index. décimale : 667.2 Colorants et pigments Résumé : Printing of conductive inks is an attractive means of manufacturing of electronic components on flexible substrates including textiles. The textiles thus produced are often referred to as “e-textiles.” When high electrical conductivity is required, inks are preferably made from metal nanoparticles such as silver. However, such inks are expensive and generally not known to withstand severe washing and wearing to which textiles are normally subjected during the end use. In the present study, which forms a part of a larger study by the authors, waterborne dispersions of conductive grades of carbon black were converted into finished inks followed by washing and creasing tests to ascertain the durability of these inks. We found that not only were the inks stable after letdown with different binders, but they possessed high electrical conductivity despite the fact that the final pigment loading in all of the formulated inks was significantly less than the pigment loading that is generally found in commercial conductive inks. In addition, the electrical conductivity after washing and creasing tests of the formulated inks was found to be significantly greater than that of the tested commercial conductive inks. This shows that using large surface area, highly conductive grades of carbon black pigments in relatively small amounts in inks for textile printing is beneficial in achieving some of the critically required characteristics, particularly those pertaining to durability of the ink film. Note de contenu : - MATERIALS : Pigment dispersions - Binders - Commercial conductive inks - Substrates - METHODS : Letdown procedure to formulate finished inks - Sample preparation - Durability testing of inks - Electrical characterization - RESULTS AND DISCUSSION : Letdown stability of finished inks - Printing and testing on textile substrates - Resistivity of multiple ink layers DOI : 10.1007/s11998-019-00214-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00214-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33015 [article]

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Novel approach to formulation modelling / Long Lin in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/00 (01-02/2000)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 1-2/00 (01-02/2000) . - p. 54-59 Titre : Novel approach to formulation modelling Type de document : texte imprimé Auteurs : Long Lin, Auteur ; James Thomas Guthrie, Auteur ; Weidong D. He, Auteur Année de publication : 2000 Article en page(s) : p. 54-59 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : Formulation optimisation is one of the more important steps in the development of surface coating systems. Several commercially available computer software packages that can be used to assist the formulation optimisation have been developed, provided that sufficient data are available. For systems having complex behaviour, more flexible techniques are needed. The approach that forms the basis of this paper is based on spline interpolations. Thus, the more complex behaviour of coating systems can be simulated and interpreted. The efficiency and the reliability of the models that have been developed have been evaluated using data that are relevant to anticorrosion coating systems. Note de contenu : - Modelling based on spline-interpolation - Anticorrosive coating systems - Materials and equipment - Experimental procedures - Preparation of coating formulations for the optimisation of the pigment contents - Test procedures - Reliability of the prediction by the model based on spline interpolation is confirmed - Efficient optimisation of surface coatings formulations Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10976 [article]

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Synthesis, stability and printing properties of a novel 2-sulphophenoxy-4-chloro-s-triazine reactive dye for ink-jet printing of wool / Saira Faisal in COLORATION TECHNOLOGY, Vol. 136, N° 2 (04/2020)

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 2 (04/2020) . - p. 153-166 Titre : Synthesis, stability and printing properties of a novel 2-sulphophenoxy-4-chloro-s-triazine reactive dye for ink-jet printing of wool Type de document : texte imprimé Auteurs : Saira Faisal, Auteur ; Long Lin, Auteur ; Matthew Clark, Auteur Année de publication : 2020 Article en page(s) : p. 153-166 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants -- Synthèse Colorants réactifs Electrophorèse capillaire Encre Fourier, Spectroscopie infrarouge à transformée de Impression sur étoffes Jaune Laine Photostabilité Résistance au lavage Solidité de la couleur Index. décimale : 667.3 Teinture et impression des tissus Résumé : We report here the synthesis and characterisation of a new medium-reactivity reactive dye containing 2-sulphophenoxy-4-chloro-s-triazine, having enhanced the activity of the chlorine atom for further substitution by the functional groups carried by wool fibre. In addition, a dichloro-s-triazine dye was also synthesised for the purpose of comparison. The progress of synthesis reactions and purity of the dyes were determined using capillary electrophoresis and thin layer chromatography. The molecular structure and the chemical compositions of the synthesised dyes were confirmed using Fourier Transform–infrared spectral data and elemental analyses. The inks containing the synthesised dyes were formulated and ink-jet-printed onto wool fabrics and then the printed fabrics were steamed at 102°C. Compared with the dichloro-s-triazine dye, superior performance in terms of ink stability, K/S and dye fixation was observed for the new 2-sulphophenoxy-4-chloro-s-triazine dye. In addition, the light fastness of the fabric printed with the inks containing the new dye was 0.5-grade greater than that of the fabric printed with the inks containing the dichloro-s-triazine dye, and no changes in shade and staining were observed following wash fastness tests of the fabrics printed with the inks containing the new dye. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of yellow 7-[(4-amino-2-methylphenyl)azo]-1,3-naphthalenedisulfonic-acid dye - Synthesis of yellow 7-[(2,4-dichloro-1,3,5-triazin-6-yl)amino-2-methylphenyl]azo]-1,3-naphthalenedisulphonic-acid dye - Synthesis of yellow 7-[(2-(4-sulphophenoxy)-4-chloro-1,3,5-triazin-6-yl)amino-2-methylphenyl]azo]-1,3-naphthalenedisulphonic-acid dye - Procedures - Application of the dyes - Physicochemical properties of the inks - Stability of the inks - K/S - Fixation - Colour fastness properties - RESULTS AND DISCUSSION : Synthesis of reactive dyes - Capillary electrophoresis (MEKC) - FTIR analysis - Physicochemical properties of the inks - Stability of the inks - Printing properties - Wash fastness - Light fastness DOI : https://doi.org/10.1111/cote.12457 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34235 [article]

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