Analytical control of leather fat by near infrared reflectance spectroscopy / H. Iturriaga in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 2 (03-04/2007)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 2 (03-04/2007) . - p. 47-51 Titre : Analytical control of leather fat by near infrared reflectance spectroscopy Type de document : texte imprimé Auteurs : H. Iturriaga, Auteur ; S. Maspoch, Auteur ; Trinitat Canals, Auteur ; D. Rey, Auteur Année de publication : 2007 Article en page(s) : p. 47-51 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de trempe -- Analyse Bains de trempe -- Teneur en matières grasses Cuirs et peaux de bovins Etalonnage Extraction par solvant Spectroscopie de réflectance Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A highly expeditious method for the direct analytical control of leather fat as an alternative to the officially endorsed methods was developed based on solvent extraction. The proposed method uses multivariate calibration with partial least-squares regression (PLSR) of diffuse reflectance spectra (NIRRS) for leather specimens. The reference values of the calibration matrix are used to derive those for powdered leather extracted with methylene chloride using the official method. Two different approaches based on matrices containing spectral information for powdered leather and spectra directly recorded on unpowdered leather samples were developed. The optimum calibration model for powdered samples is based on the second spectral derivative and 3 PLS components, and provides overall relative calibration and prediction errors in the region of 5%. On the other hand, the optimum prediction model uses the first spectral derivative and 5 PLS components; the results are similarly as good as those of the calibration model, but the prediction of some external samples results in larger errors arising from the inability to construct calibration sets encompassing the whole variability of the prediction set. Fibre optic-based NIR spectroscopy in combination with multivariate calibration appears to be an effective alternative to existing methods for the analysis and control of fat in the leather tanning industry as it is a rapid method and uses no reagents. Note de contenu : - EXPERIMENTAL PROCEDURES : Leather and fat-liquoring - Samples - Apparatus and software - Recording of NIR spectra - Processing of data - RESULTS AND DISCUSSION : Powdered sample method - Direct recording method - Table 1 : Fat content in the fat-liquoring baths and values provided by the reference method (RM) - Table 2 : Relative standard errors for the calibration and prediction sets as calculated using various calibration models for the powdered (p) and unpowdered (l) samples - Table 3 : Fat content in each calibration and external prediction sample as determined using both methods (p and l) En ligne : https://drive.google.com/file/d/1jRdhYSyPRuG-TxoFtUWG6VS8NNillbld/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39032 [article]

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Application of digital image analyses to measure print quality / William Lim in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 894 (07/1999)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 894 (07/1999) . - p. 73-78 Titre : Application of digital image analyses to measure print quality Type de document : texte imprimé Auteurs : William Lim, Auteur ; Suresh Mani, Auteur Année de publication : 1999 Article en page(s) : p. 73-78 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse qualitative (chimie) Etalonnage Imagerie numérique Impression numérique Lecteurs optiques Mesure -- Instruments Index. décimale : 667.4 Encres Résumé : The digital image analyses method is capable of objective and reproducible measurements of print mottle. The results of the scanner calibration test show improved consistency in the mottle values between different scanners. This would allow many locations to have their own analysis station without compromising a "universal" measurement. The mottle measurements of the Heidelberg standards correspond to the visual ranking. The robustness of the scanner method was shown by tests of prints on different substrates. Finally, a modified version of the analysis shows that halftone prints can also be tested. The method described here shows good agreement with the Tobias mottle tester. Note de contenu : - Mottle measurement - EXPERIMENTAL : Calibration tests for universal measurements - RESULTS : Scanner-to-scanner consistency - Effect of the calibration on consistency of a single scanner - DISCUSSION : Heidelberg standards measured - Cryovac poultry films measured - Rohm and Haas halftone prints Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17916 [article]

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Automated grading with Al and traceability / Neil Martin in INTERNATIONAL LEATHER MAKER (ILM), N° 49 (09-10/2021)  

[article]  inINTERNATIONAL LEATHER MAKER (ILM) > N° 49 (09-10/2021) . - p. 20-21 Titre : Automated grading with Al and traceability Type de document : texte imprimé Auteurs : Neil Martin, Personne interviewée Année de publication : 2021 Article en page(s) : p. 20-21 Langues : Anglais (eng) Catégories : Automatisation Cuirs et peaux Cuirs et peaux -- Défauts Détection de défauts (Ingénierie) Etalonnage Qualité -- Contrôle Traçabilité Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Mindhive is a tech company in New Zealand that discovered the power of AI in detecting defects in leather hides seven years ago. Its Model V Grading is flow quickly growing in popularity among tanneries as well as shoe and automotive manufacturers. Industry requests have since led to the company also developing a robust traceability solution that is deployable in tanneries of any size. This enables tanners to achieve a key sustainability goal. But Leathertracer, as the solution is called, has another significant advantage. Mindhive's CEO Neil Martin explains its impact. Note de contenu : - Many tanneries have played with various approaches to achieve traceability. Some use a documented system; others are experimenting with tattooed ID's. What makes Mindhive's Leathertracer unique ? - What about your other solution, Model V Grading: artificial intelligence to detect defects? How can you guarantee this solution could do as good a job as a 'master grader' with 30+ years' experience ? - Ok, but artificial intelligence is a very new, expensive technology. How can tanners deploy this as a commercially advantageous business case for their tannery ? - And what is the benefit of deploying both solutions together ? - What were the responses and uptake of these solutions to date ? En ligne : https://drive.google.com/file/d/1JE0HkhbbJuzklQWupDzzCR_c9Dc787RA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36189 [article]

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B4 cup calibration / Mukund Hulyalkar in PAINTINDIA, Vol. LXVII, N° 4 (04/2017)  

[article]  inPAINTINDIA > Vol. LXVII, N° 4 (04/2017) . - p. 118 Titre : B4 cup calibration Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2017 Article en page(s) : p. 118 Langues : Anglais (eng) Catégories : Etalonnage Revêtements:Peinture Rhéologie Index. décimale : 667.6 Peintures Résumé : There is always a dispute between consumer and supplier about viscosity of paint. Viscosity changes with temperature. About that we have already discussed and easy reckoner chart was given. Another reason is difference of viscosity with respect of B4 cups because all cups are not calibrated by competent authority. To obtain the certificate for standardization the cost is approximatel Y 5-6K. In a paint industry minimum 4-5 cups are required by different departments. Hence use of certified B4 cups in each department is not affordable. For this author has derived this graph of calibration for easy access, therefore the company needs to buy only ONE certified B4 cup. This graph can be printed, laminated and can be given to all. En ligne : https://drive.google.com/file/d/1qmRAakQMblaT8Tggj2GFy5jDga2oKpgC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28466 [article]

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Biomordanting willow bark dye on cellulosic materials / Tia Lohtander in COLORATION TECHNOLOGY, Vol. 136, N° 1 (02/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 1 (02/2020) . - p. 4-14 Titre : Biomordanting willow bark dye on cellulosic materials Type de document : texte imprimé Auteurs : Tia Lohtander, Auteur ; Suvi Arola, Auteur ; Päivi Laaksonen, Auteur Année de publication : 2020 Article en page(s) : p. 4-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Analyse spectrale Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Chromatographie en phase liquide à hautes performances Colorants -- Absorption Colorants -- Adsorption Colorants végétaux Ecorces Etalonnage Extraction (chimie) Mordançage (teinture) Saules et constituants Teinture Index. décimale : 667.3 Teinture et impression des tissus Résumé : A semi-quantitative study of willow bark dye adsorption on two different cellulose materials using biomordants was carried out. The studied celluloses were microcrystalline cellulose (MCC) AaltoCell and regenerated Ioncell-F (IC) fibres. The dye was a hot water extract of willow bark and the adsorption to cellulose was carried out using carboxylic acid-containing biomordants, namely, oxalic acid, citric acid and tannic acid. Alum was employed as the reference mordant. A semi-quantitative estimation of the dye uptake was conducted using high-performance liquid chromatography equipped with a diode array detector and also by visual inspection, as well as an evaluation of the coloration using CIELab parameters. The mechanism of the dye adsorption on the cellulose surfaces was studied via Fourier Transform–infrared spectroscopy. According to the results, MCC had a higher affinity for polyphenolic dye than the regenerated cellulose fibres. Dye uptake on MCC was 50%-80% and 44%-57% on IC. For MCC, the biomordants improved the dye uptake more effectively than the control mordant, alum, whereas for IC the biomordants were less effective than alum. Note de contenu : - EXPERIMENTAL : Cellulose materials - Dye materials and chemicals - Dye extraction - Dyeing of cellulosic materials - Preparation of HPLC samples - Spectrophotometric measurements - HPLC-DAD-MS analysis - Calibration curves - Calculation of dye adsorption - RESULTS AND DISCUSSION : Spectrophotometric characterisation of WBE - Composition of the WBE solutions - Dyeing of cellulosic materials - Dye adsorption efficiency DOI : https://doi.org/10.1111/cote.12442 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12442 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33695 [article]

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Colorimetric sensor based on polymeric thin film for arsenic quantitation using colour response calibration / Saowanee Toonchue in COLORATION TECHNOLOGY, Vol. 139, N° 3 (06/2023)  

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A colour printer calibration method based on gamut division algorithms / Bangyong Sun in COLORATION TECHNOLOGY, Vol. 130, N° 6 (12/2014)  

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Comparison of computer colour matching of water-based and solvent-based reverse micellar dyeing of cotton fibre / Alan Y. L. Tang in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)  

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Construire un colorimètre et évaluer l'incertitude des méthodes de dosage par étalonnage / Jérôme Randon in L'ACTUALITE CHIMIQUE, N° 452 (06/2020)  

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Determination of the reactive dye navy blue her in the wastewaters of the dyeing processes of chrome-tanned leather / L. S. P. Santos in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 10 (10/2014)  

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Ensure accurate "dry film thickness" readings : 10 important things to know in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)  

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L'étalonnage en question / M. Biron in CAOUTCHOUCS & PLASTIQUES, N° 730 (03/1994)

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Laying the foundations for precision profiles / Gerhard Wieser in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 5 (05/2013)

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Measurement reliability over the entire life cycle in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 15, N° 1 (2022)  

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Model the media influence on plastics faster and easier / Felix Melzer in PLASTICS INSIGHTS, Vol. 113, N° 8 (2023)  

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New sizing formulation for recycled carbon fibres / Alessandra Passaro in JEC COMPOSITES MAGAZINE, N° 132 (01-02/2020)  

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Non-destructive measurement of coating thicknesses / Hendrik Brenig in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 10, N° 1 (2017)  

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Optimum pigment calibration for the paint and plastic industry / Rik Mertens in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4625 (10/2016)  

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Plastiques. Analyse calorimétrique différentielle (DSC) - Partie 3 : Détermination de la température et de l'enthalpie de fusion et de cristallisation - Norme NF EN ISO 11357-3 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2013)

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Plastiques - Analyse calorimétrique différentielle (DSC) - Partie 7 : Détermination de la cinétique de cristallisation - Norme NF EN ISO 11357-7 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2013)

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