Application of FT-infrared spectroscopy to the study of structural changes of leather during tannery processing / Z. Bajza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 6 (11-12/1997)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 6 (11-12/1997) . - p. 219-223 Titre : Application of FT-infrared spectroscopy to the study of structural changes of leather during tannery processing Type de document : texte imprimé Auteurs : Z. Bajza, Auteur ; J. Posaric, Auteur ; N. Sugnetic, Auteur Année de publication : 1997 Article en page(s) : p. 219-223 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : During manufacture the structure and properties of a rawhide changed by the addition of auxiliaries. Efficient control of these processes reaquires difficult annalytical work. In this work, the FTIR-spectroscopy by attenuated total reflection (ATR) was used to analyse the changes in the natural matrix of the raw cow hide during tanning and finishing. TO obtain reliable results and to minimise errors caused by the inhomogenity of samples, five pairs, of samples were cut from the treated hide after every step of the process. Because of result scatter spectrum averaging was used to process the results. The averaged spectra were subtracted either from the spectrum of a raw hide (standar), or from the spectrum of the sample prepared in an earlier stage. The differential table obtained was correlated to known data. It was possible from the spectra (except for that of limedhide) to determine changes in constitution of the hide as well as constituents added to the collagen matrix. Absorption bands of carbonyls, sulphate anion, sulphonates, siliconees and nitro-compounds, as well as the C-H bending of the alkyl chains of added auxiliaries allow identification of the process step and determination of the content off added agents, as well. The simplicity of the method and results obtained make it very useful as a method for QC and QA in tanning processes. En ligne : https://drive.google.com/file/d/1_ORMSCeDHoWPlZG_r5MMRjZUlWh3uYSg/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7950 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
007019	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Experimental evaluation of the microwave drying of leather / D. Skansi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 6 (11-12/1995)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 6 (11-12/1995) . - p. 171-177 Titre : Experimental evaluation of the microwave drying of leather Type de document : texte imprimé Auteurs : D. Skansi, Auteur ; Z. Bajza, Auteur ; A. Arapovic, Auteur Année de publication : 1995 Article en page(s) : p. 171-177 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The microwave drying of industrially prepared leather has been experimentally investigated on a laboratory scale. The experiments were performed at three different levels of microwave heating power. Measuring the mass of the sample through the drying duration, the kinetic drying curves were obtained. For correlation of experimental results the exponential model X = (a - Xeq).exp(-b.td)+Xeq and its differential form has been applied. Results obtained show a high level of correlation, and a strong relationshp between applied microwave power and drying time (rate), type of leather sample and their pretreatment (vacuum and sidewise dewatering). En ligne : https://drive.google.com/file/d/1yZCEr06MDmckd9BwEt1FjZWXf66vfC6c/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8196 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
007007	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Experimental studies in restoration and conservation of historical leather / Z. Bajza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 1 (01-02/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 1 (01-02/2004) . - p. 18-22 Titre : Experimental studies in restoration and conservation of historical leather Type de document : texte imprimé Auteurs : Z. Bajza, Auteur ; P. Hitrec, Auteur ; M. Muzic, Auteur ; D. Medic, Auteur ; D. Krstic, Auteur Année de publication : 2004 Article en page(s) : p. 18-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Antiquités (objets anciens) -- Conservation et restauration Cuirs et peaux -- Analyse Objets d'art -- Conservation et restauration Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This article investigates the main properties of 300-year old leather wallhanging dating to the late 17th century, originating from St. Peter and Paul’s church in the village of Sveti Petar u s˘umi in Istria. Tests were carried out according to standard IUC methods (ISO 4047), and microphotographs of cryostat prepared test samples were taken. The leather surface layer was investigated using a UV (ATR) spectrophotometer, thinlayer chromatography and a PIXE spectrophotometer. Examination indicates that the leather is calf-bovine and was vegetable tanned. Formal suggestions were made for cleaning and preserving the leather wallhanging, it was suggested that the best solution would be to attach (adhere) the historic leather to new leather. Note de contenu : - MATERIALS AND METHODS : Microscopic examination - Thin-layer chromatography - Analysis by PIXE spectroscopy - nuclear IRB micro-test (of the red glaze) - RESULTS AND DISCUSSION : Organoleptic assessment - Determination of volatile matter in leather (water, etc.) - Determination of materials soluble in tetrachloromethane - Determination of pH and difference value of the aqueous leather extract - Determination of total ash - Thin-layer chromatography - Examination of the surface layer En ligne : https://drive.google.com/file/d/1SO3DzSqPU531XaIwPKqj2ynsnmZjZJmK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39651 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Influence of various waterproofing agents on water and water vapour absorption and permeability / Z. Bajza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 4 (07-08/2003) . - p. 144-148 Titre : Influence of various waterproofing agents on water and water vapour absorption and permeability Type de document : texte imprimé Auteurs : Z. Bajza, Auteur ; P. Hitrec, Auteur ; M. Muzic, Auteur Année de publication : 2003 Article en page(s) : p. 144-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuirs et peaux de bovins Essais (technologie) Humidité -- Absorption Imperméabilisants Imperméabilisation Perméabilité Vapeur d'eau Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this article, the influence on finished leather properties of five different waterproofing agents has been examined. Wet-salted bovine hide (weight category 35 kg) was treated in an half-industrial environment by conventionally used liming, tanning and retanning processes. 9% offers of five different waterproofing agents were used for the waterproofing process. The levels of water vapour, fats, ash and Cr2O3 were determined for the crust leather. The water vapour permeability, leather porosity to water vapour and absorption of water (measured on both the Kubelka apparatus and the Bally penetrometer) were determined. The water repellency properties of each waterproofing agent were estimated from the results. En ligne : https://drive.google.com/file/d/1uB8WAlL7pxLmIPnHSo5luEG48YxHyahc/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39770 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Pollution abatement and waste management in the croatian tanning industry / S. Selanec in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 80, N° 5 (09-10/1996)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 80, N° 5 (09-10/1996) . - p. 154-157 Titre : Pollution abatement and waste management in the croatian tanning industry Type de document : texte imprimé Auteurs : S. Selanec, Auteur ; Z. Bajza, Auteur Année de publication : 1996 Article en page(s) : p. 154-157 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie -- Aspect de l'environnement Cuirs et peaux -- Industrie -- Croatie Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Factors influencing the quality of environment in the leather industry in Croatia, have been reviewed. At the moment, Coratia has six large factories, four medium and a number of small manufacturers, which have not adequately solved the issue of effluent treatment. Details regarding leather processing and consequent pollution in Croatia and individual tanneries are shown in the report. En ligne : https://drive.google.com/file/d/1aK3gDy4wq-SI-p5Qnunw2PXdObuJBtUK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8094 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
007012	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The influence of fatliquor concentration on microwave drying kinetics / Z. Bajza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 6 (11-12/1997)  

Permalink

---

1 (1 - 6 / 6)