| 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 chrome
|
| Index. 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 syntan |
| Note 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 4 |
| En ligne : |
https://drive.google.com/file/d/1hY8aY_QacT_ouLkKfJmdB63SvVhRHWTO/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| 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
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One shot chrome tannages in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 12 (12/1970)
