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Newer syntans / J. C. Bickley in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)
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Titre : Newer syntans Type de document : texte imprimé Auteurs : J. C. Bickley, Auteur Année de publication : 1986 Article en page(s) : p. 143-144 Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : Syntans as dispersing agents - Neutralising agents and Syntan acidification - Dyeing of Syntan treated leather - Light fastness - Protein-containing Syntans - Acrylic type Syntans - Polyurethanes - Combination with aluminium. En ligne : https://drive.google.com/file/d/1yhBjzPzEVxuzXdkH-Pdx5FDdRbD_sWMb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9232
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 70 (Année 1986) . - p. 143-144[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007133 - Périodique Bibliothèque principale Documentaires Disponible One shot chrome tannages / J. C. Bickley in JOURNAL OF THE SOCIETY OF LEATHER TRADES' CHEMISTS, Vol. 54, N° 12 (12/1970)
[article]
Titre : One shot chrome tannages Type de document : texte imprimé Auteurs : J. C. Bickley, Auteur ; H. Lee, Auteur ; J. B. Whitton, Auteur Année de publication : 1970 Article en page(s) : p. 431-442 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie)
Carbonate de sodiumLe carbonate de sodium est un composé chimique ayant pour formule Na2CO3. Il s'agit d'un sel de sodium de l'acide carbonique. Dans le langage courant, on parle aussi de soude ou de cristaux de soude, à cause de son contenu en sodium et de sa forme habituellement cristalline. Par contre, il ne faut pas confondre le carbonate de sodium avec la soude caustique ou encore avec le bicarbonate de soude.
Cuirs et peaux -- Analyse
Mélanges (chimie)
Naphtalène
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : After reviewing published methods of shortening and simplifying the chrome tanning process, the elimination.of the basification stage was chosen for further investigation.
Firstly, the rates of reaction between freshly prepared solutions of chrome powder and various added basifying agents was determined.
As a result of these findings, a number of bases were selected for further trials in laboratory scale tannages carried out on hide pieces. To obtain satisfactory penetration and even distribution of chrome, a short pickle was found to be essential. However, using these short float powder tannages, the importance of hide location was found to be more marked than in a conven-tional tannage and this made difficult the interpretation of the results obtained.
For the final assessment, therefore, matched sides were used for com-parison with a conventional system. A chemical and physical analysis of the leather was carried out in addition to a subjective assessment.
All the leathers produced were judged to be commercially acceptable but the following powder systems appeared to give superior results to the conventional long float method using chrome liquor :
- I : A commercially available self-basifying chrome powder
- II : A mixture of chrome powder and "Whiting"
- III : A mixture of chrome powder, soda ash and neutral naphthalene syntanNote de contenu : - Table 1 : Analysis of basifying materials
- Table 2 : Analysis of leather from experiment 2
- Table 3 : Analysis of leather from experiment 3
- Table 4 : Analysis of Finished Leather from Experiment 4
- Table 5 : Subjective assessment of finished leather from experiment 4Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35671
in JOURNAL OF THE SOCIETY OF LEATHER TRADES' CHEMISTS > Vol. 54, N° 12 (12/1970) . - p. 431-442[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007089 - Périodique Bibliothèque principale Documentaires Disponible One shot chrome tannages / J. C. Bickley in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 12 (12/1970)
[article]
Titre : One shot chrome tannages Type de document : texte imprimé Auteurs : J. C. Bickley, Auteur ; H. Lee, Auteur ; J. B. Whitton, Auteur Année de publication : 1970 Article en page(s) : p. 431-442 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Basification (chimie)
Carbonate de sodiumLe carbonate de sodium est un composé chimique ayant pour formule Na2CO3. Il s'agit d'un sel de sodium de l'acide carbonique. Dans le langage courant, on parle aussi de soude ou de cristaux de soude, à cause de son contenu en sodium et de sa forme habituellement cristalline. Par contre, il ne faut pas confondre le carbonate de sodium avec la soude caustique ou encore avec le bicarbonate de soude.
Cuirs et peaux -- Analyse
Cuirs et peaux -- Finition
Naphtalène
Poudres
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : After reviewing published methods of shortening and simplifying the chrome tanning process, the elimination of the basification stage was chosen for further investigation.
Firstly, the rates of reaction between freshly prepared solutions of chrome powder and various added basifying agents was determined. As a result of these findings, a number of bases were selected for further trials in laboratory scale tannages carried Out on hide pieces. To obtain satisfactory penetration and even distribution of chrome, a short pickle was found to be essential. However, using these short float powder tannages, the importance of hide location was found to be more marked than in a conventional tannage and this made difficult the interpretation of the results obtained.
For the final assessment, therefore, matched sides were used for comparison with a conventional system. A chemical and physical analysis of the leather was carried out in addition to a subjective assessment.
All the leathers produced were judged to be commercially acceptable but the following powder systems appeared to give superior results to the conventional long float method using chrome liquor :
(I) A commercially available self-basifying chrome powder
(II) A mixture of chrome powder and “Whiting”
(III) A mixture of chrome powder, soda ash and neutral naphthalene syntanNote de contenu : - Table 1 : Analysis of basifying materials
- Table 2 : Analysis of leather from experiment 2
- Table 3 : Analysis of leather from experiment 3
- Table 4 : Analysis of leather from experiment 4
- Table 5 : Subjective assessment of finished leather from experiment 4En ligne : https://drive.google.com/file/d/1hY8aY_QacT_ouLkKfJmdB63SvVhRHWTO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40710
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 54, N° 12 (12/1970) . - p. 431-442[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Vegetable and synthetic tannins / J. C. Bickley in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 77, N° 2 (03-04/1993)
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Titre : Vegetable and synthetic tannins : Some notes on procedures for routine analysis Type de document : texte imprimé Auteurs : J. C. Bickley, Auteur Année de publication : 1993 Article en page(s) : p. 50-54 Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : 1. CHEMICAL COMPOSITION
2. IDENTIFICATION : Identification of vegetable tannins - Identification of syntans.
3. QUANTITATIVE ANALYSIS : Quantitative analysis of vegetable tannins - Tannin content by the SLTC shake method - Acide and salt content - Sulphur dioxide in tannery liquors - Quantitative analysis of syntans - Tannin analysis-Tanning fifure - Acidity and titration curve - Buffer capacity-and pH - Precipitability of resins - Sulphate determination - Ultra violet spectroscopy - Ammoniacal and total nitrogen - Evaluation of self-basifying syntans - Sensitivity.
4. ADJUSTMENT AND BLENDING OF TAN LIQUORS : Adjustment of solids or tan content - Blending of tannin extracts.En ligne : https://drive.google.com/file/d/1vLLUYc1FTWIASKOvNf4ymwDS7vac0tqH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8555
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 77, N° 2 (03-04/1993) . - p. 50-54[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006991 - Périodique Bibliothèque principale Documentaires Disponible Vegetable tannins and tanning / J. C. Bickley in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 76, N° 1 (01-02/1992)
[article]
Titre : Vegetable tannins and tanning Type de document : texte imprimé Auteurs : J. C. Bickley, Auteur Année de publication : 1992 Article en page(s) : p. 1-5 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The paper presents a necessarily brief review of tannins and tanning, covering the following topics. Tannins : Occurence of tannins in nature, reason for existence and relationship to plant metabolims. Chemical types - classification into condensed tannins, ellagitannins and gallotannins.
Tanning : Tannin/protein interaction - electrovalent and hydrogen bonds and hydrophobic interaction. Equilibrium between tannin and protein-tanning as a polar absorption. Principles of vegetable tanning. Importance of acids, salts and other osmotic considerations.En ligne : https://drive.google.com/file/d/1Dq2C9c9znRo7b0CKqkoU4U8KIKIpcakX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8640
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 76, N° 1 (01-02/1992) . - p. 1-5[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006984 - Périodique Bibliothèque principale Documentaires Disponible