| Titre : |
Within and between skin variation of physical properties in bovine leather |
| Type de document : |
texte imprimé |
| Auteurs : |
A. W. Landmann, Auteur |
| Année de publication : |
1979 |
| Article en page(s) : |
p. 45-48 |
| Note générale : |
Glossaire |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de bovins
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
There is an increasing interest in selling and buying leather to specification and in within tannery quality control. Fundamental to this problem is a knowledge of within and between skin variability. American workers have published a series of papers dealing with the variability of varions sampling locations with the objective of choosing the most representative area (giving results most nearly to the mean). The experiments generated a great deal of information, of which it was unfortunately only possible to publish a summary. A more recent paper by van Vlimmeren brings this information more up to date but again average values for each location are quoted. This enables a correction for mean value of the total area from the results at a sampling location. Mean values can however be only an indication of performance; more important is the percentage area under a given limit if in order to make a shoe, the leather must have a tear strength of 5 kg, it is little use saying that the mean value is 5.5 kg. This could mean that 40 % of the population could well be below the required limit. It is therefore important to know something of the type of distribution or it would require a very large sample to ensure that if there is any significant proportion in the pack below the limit that one or more of these is actually present in the sample which is taken. Lollar4 showed that in a pack of 350 hide samples at the britch that the distribution of stich tear results was approximately "normal" in distribution, and there was the suggestion that other properties might be similarly distributed. |
| Note de contenu : |
- Current basis of sampling
- The quantitative approach
- The combination of within skin variation and between skin variation and its effect on specification |
| En ligne : |
https://drive.google.com/file/d/1l-Z7or4jsQ5VYBHXYiXN7egN3sBO9KuB/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31885 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 63, N° 3 (05-06/1979) . - p. 45-48
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Within and between skin variation of physical properties in bovine leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 63, N° 3 (05-06/1979)
