Titre : |
Gaseous sulfur dioxide used to preserve hides - an evaluation |
Type de document : |
texte imprimé |
Auteurs : |
William J. Hopkins, Auteur |
Année de publication : |
1980 |
Article en page(s) : |
p. 389-402 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Index. décimale : |
675 Technologie du cuir et de la fourrure |
Résumé : |
Sulfur dioxide is the active preservative of the acid/sulfite method proposed and sucessfully evaluated by this Center. This report involves direct application of the active ingredient in the gaseous form. The sulfur dioxide was generated by adding warious concentrations of NaHS03 to an acid solution. Treated hide samples that were stored for up to 28 days were preserved satisfactorily when judged by microbial counts and observation. Acidification of the hide samples before treatments significantly lowered the amount of sulfur dioxide needed for preservation.
Whole cowhides that were treated with 1.32 percent sulfur dioxide (generated from 2.0 percent NaHSO3) based on hide weight were held in storage for 8 days and for 1 month. Cowhides that were acidified before treatment were treated with 0.33 percent sulfur dioxide (generated from 0.5 percent NaHSO3) based on hide weight and were held in storage for 8 days. These hides were processed comercially into crust leather of acceptable quality.
Compared to drum salting or brine curing, the direct application of a gas has the advantages of (1) not needing water or agitation and (2) eliminating the high dissolved solids and sodium ion content of beamhouse effluents that would occur if salt-cured hides were used. Relatively small amounts of the preservative are needed and the estimated material costs are small. |
Note de contenu : |
- Laboratory studies
- Large-scale studies
- Preacidification
- Determination of excess sulfur dioxide
- Analytical methodology and physical testing |
En ligne : |
https://drive.google.com/file/d/1wfFc4mq58WVwEg7bmzkodM-PW-0BSpH8/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17779 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXV (Année 1980) . - p. 389-402