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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]
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 -- InstrumentsIndex. 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 printsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17916
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 894 (07/1999) . - p. 73-78[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003562 - Périodique Bibliothèque principale Documentaires Disponible Colour management in digital textile printing / Dejana Javorsek in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)
[article]
Titre : Colour management in digital textile printing Type de document : texte imprimé Auteurs : Dejana Javorsek, Auteur ; Andrej Javorsek, Auteur Année de publication : 2011 Article en page(s) : p. 235--239 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Impression au laser
Impression jet d'encre
Impression numérique
Impression sur étoffes
Simulation, Méthode deIndex. décimale : 667.3 Teinture et impression des tissus Résumé : On the basis of simulated prints, a customer can decide on the colour appropriateness for a selected pattern. This article presents the possibilities and correct procedure for colour management application in the field of digital printing onto a textile substrate. The aim of the research was to establish whether long-term and expensive pre- and after-treatments can be avoided with the help of an appropriate development of printer profiles. The latter would be conducted through a print simulation on paper printed with a Canon laser or ink-jet printer. The results have confirmed that a print simulation on paper can be conducted with both printers, while a Canon ink-jet printer offers better results. In addition, by calculating the colour inconstancy index CMCCON02, the illuminant influence on the colour change of substrates under five different illuminations was determined. The results showed that simulated colours should be compared with original colours under daylight illuminants (D50, D55 and D75), while indoor illuminants A and F2 are not appropriate for a comparison, especially in the case of simulation with a Canon ink-jet printer (CMCCON02 index >5). Note de contenu : EXPERIMENTAL : Material - Pretreatment of textile fabric - Linearisation and characterisation of printer devices - Colour samples - Printing process performed on the Mimaki ink-jet printer - Simulation of prints - Colour measurements - Calculation of the colour inconstancy index CMCCON02.
RESULTS AND DISCUSSION : Colour inconstancy index - Simulation of prints.DOI : 10.1111/j.1478-4408.2011.00304.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11903
in COLORATION TECHNOLOGY > Vol. 127, N° 4 (2011) . - p. 235--239[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013185 - Périodique Bibliothèque principale Documentaires Disponible Colour stability during production of printed ocular prostheses / Ethan Bunker in COLORATION TECHNOLOGY, Vol. 139, N° 5 (10/2023)
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Titre : Colour stability during production of printed ocular prostheses Type de document : texte imprimé Auteurs : Ethan Bunker, Auteur ; Algy Kazlauciunas, Auteur ; Thimothy Zoltie, Auteur ; Emma Walshaw, Auteur ; Paul Bartlett, Auteur ; Tom Archer, Auteur ; Taras Gout, Auteur Année de publication : 2023 Article en page(s) : p. 596-609 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse de variance En statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Colorimétrie
Couleurs -- Stabilité
Impression numérique
Polyacryliques
Prothèses oculaires
StatistiquesIndex. décimale : 535.6 Couleur Résumé : Ocular prostheses have been used for centuries to restore patient confidence, psychosocial relationships and to improve quality of life. Methodology for producing accurate prostheses has improved with technological discoveries. Recently, hand painting ocular prostheses has been the go-to method for creating life like prostheses. However, digital printing a print to envelope around an acrylic prosthesis has been shown to decrease treatment and rehabilitation times, whilst still producing high-definition ocular prostheses. Despite these improvements, little is known about the colour stability of digitally printed ocular prostheses. To better understand the colour stability of digital prostheses 30 samples simulating ocular prostheses were created, containing 10 with blue iris, 10 combination/green iris and 10 with sepia (brown) irises. Colour measurements were taken using a data spectrophotometer, from two defined points, the iris and sclera for both pre-polymerisation and post-polymerisation to assess colour variance. Colour coordinate data was gathered and was analysed using a one-way analysis of variance test and a paired t-test, both with alpha = 0.05. Significant colour variations were found for each iris colour and for the sclera. The sclera showed the largest colour variation with a ΔE of 4.75, followed by the brown irises, the green irises and then blue irises with ΔE values of 3.29, 2.47 and 1.82, respectively. This is a significant decrease compared to current hand painting methods which have an average colour variance of ΔE = 20. This shows a large increase in colour stability which can drastically improve patient satisfaction and quality of life. Note de contenu : - INTRODUCTION : History of ocular prostheses - Hand-painted acrylic ocular prostheses (HPAOP) - Digitally-printed acrylic ocular prostheses (DPAOP) - Production of acrylic ocular prostheses
- RESEARCH OBJECTIVES
- SCOPE OF STUDY
- PROCEDURES : Participants - Simulated ocular prosthesis synthesis - Colour measurement procedure - Statistical analysis
- RESULTS AND DISCUSSION : Reflectance data - Grayscale - Colour analysis-CIELab - Paired t-test analysis - Literature comparison - ANOVA
- Table 1 : Grayscale mean ratings given for the sclera, brown iris, green iris and blue iris. These ratings are means across all prostheses
- Table 2 : Table showing mean CIELab colour coordinates for each iris colour and the mean sclera
- Table 3 : The t stat values for the paired t-test used to determine statistical significance pre-polymerisation and post-polymerisation
- Table 4 : The total colour difference for each iris colour and the sclera. The data is expressed as the mean (standard deviation)
- Table 5 : The ANOVA test resultsDOI : https://doi.org/10.1111/cote.12674 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12674 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39838
in COLORATION TECHNOLOGY > Vol. 139, N° 5 (10/2023) . - p. 596-609[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24204 - Périodique Bibliothèque principale Documentaires Disponible Comparison of chromatic adaptation transforms used in textile printing sample preparation / Dejana Dordevic in COLORATION TECHNOLOGY, Vol. 126, N° 5 (2011)
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Titre : Comparison of chromatic adaptation transforms used in textile printing sample preparation Type de document : texte imprimé Auteurs : Dejana Dordevic, Auteur ; Andrej Javorsek, Auteur ; Aleš Hladnik, Auteur Année de publication : 2011 Article en page(s) : p. 275-281 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Colorants
Impression numérique
Impression sur étoffes
Textiles et tissus imprimés
vision des couleursIndex. décimale : 667.3 Teinture et impression des tissus Résumé : As image-capturing devices, such as scanners or digital cameras, normally describe data in RGB colour space, it is impossible to get a complete raw spectral description of a sample’s colour. Device characterisation enables conversion of RGB values to corresponding XYZ tristimulus values of a sample. For transformation of tristimulus values from one illuminant to another, chromatic adaptation transforms should be used. Within our research, chromatic adaptation transforms were implemented in the field of digital textile printing of textile substrate with reactive dyes. Five chromatic adaptation transforms were investigated and their performance was assessed with cluster analysis. Results showed that the lowest mean colour differences were generated with the D50-D65 illuminant pair, followed by D50-A and D65-A. The same performance ranking of different chromatic adaptation transforms was obtained for both D50-A and D65-A illuminant pairs. The Bradford method showed the best results irrespective of the examined illuminant pair combination. DOI : 10.1111/j.1478-4408.2010.00258.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00258.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10891
in COLORATION TECHNOLOGY > Vol. 126, N° 5 (2011) . - p. 275-281[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012842 - Périodique Bibliothèque principale Documentaires Disponible 012846 - Périodique Bibliothèque principale Documentaires Disponible Deinking of indigo prints using high-intensity ultrasound / A. Fricker in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
[article]
Titre : Deinking of indigo prints using high-intensity ultrasound Type de document : texte imprimé Auteurs : A. Fricker, Auteur ; A. Manning, Auteur ; R. Thompson, Auteur Année de publication : 2006 Article en page(s) : p. 145-155 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Désencrage
Encre électronique
Impression numérique
Indigo
Papier et carton couché
UltrasonsIndex. décimale : 667.9 Revêtements et enduits Résumé : Fears have been expressed about the difficulty of deinking waste paper generated by the Indigo printing process. In this study, high-intensity ultrasound has been used to remove ink from Indigo digitally printed papers and break the ink particles down to sizes which are compatible with the flotation process used in deinking plants. The influences of temperature and power density have been studied and both found to have a significant effect on the resultant ink particle-size distributions. Almost 100% ink detachment has been achieved using a combination of ultrasound and aqueous washing. The conclusion is that detachment and particle-size reduction using ultrasound and aqueous washing suggests that Indigo digitally printed papers may not be so difficult to deink and recycle as originally thought. Note de contenu : - Experimental
- Results for preliminary trials
- Discussion of preliminary results
- Sapphire coated paper
- Text and image prints
- Indigo inks printed as solids on sapphire coated paper
- Summary of reesults for sapphire coated paper
- Table 1 : Summary of preliminary findings
- Table 2 : Summary of counts for unsonicated and 20 minutes sonicated text and image samples
- Table 3 : Percentages removed onwashingDOI : 10.1007/BF02699644 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699644.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5385
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B2 (06/2006) . - p. 145-155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004796 - Périodique Bibliothèque principale Documentaires Disponible Developments for UV LED curing / Stacy Hoge in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4602 (11/2014)
PermalinkDigital and conventional printing and dyeing with the natural dye annatto: optimisation and standardisation processes to meet future demands / Georgios Savvidis in COLORATION TECHNOLOGY, Vol. 129, N° 1 (02/2013)
PermalinkPermalinkFixation des colorants jet d'encre / Pierre Viallier in L'INDUSTRIE TEXTILE, N° 1331 (05/2001)
PermalinkPermalinkL'impression numérique gagne du terrain / Eglantine Maugard in CAOUTCHOUCS & PLASTIQUES, N° 791 (12/2000)
PermalinkInk-jet printing of cotton with natural dyes / Georgios Savvidis in COLORATION TECHNOLOGY, Vol. 130, N° 3 (06/2014)
PermalinkInkjet technology for digital fabrication / Ian M. Hutchings / London [United Kingdom] : John Wiley & Sons (2013)
PermalinkPermalinkJet d'encre / Bruno Sueur in L'INDUSTRIE TEXTILE, N° 1331 (05/2001)
PermalinkPermalinkPermalinkPermalinkPhotochromic ink formulation for digital inkjet printing and colour measurement of printed polyester fabrics / Mohanad Aldib in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)
PermalinkSeeking a paper for digital printing with maximum gamut volume : a lesson from artificial intelligence / Maryam Ataeefard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
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