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Quantification of hide defects on today's leather / Robert G. Koeppen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 1 (01/1991)
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Titre : Quantification of hide defects on today's leather : An attempt to quantify common parasite and insect damage as well as urine/manure damage over a full year Type de document : texte imprimé Auteurs : Robert G. Koeppen, Auteur Année de publication : 1991 Article en page(s) : p. 8-13 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Parasite and insect damage appear to be very significant causes for downgrading of bluestock,crust stock,or finished leathers.The purpose of this work was to produce a baseline for the most common causes of damage, which are pitting,grubs,mange,warts, and ringworm.This information was gathered and plotted for one year to see if seasonal changes had any bearing on the incidence of the defect.In this work we counted both 'healed' and 'open' defects as long as they were distinguishable.No attempt has been made to separate data of 'healed' verses 'open', or to quantify the percent of area involved in the defect.
This method incorporates a small amount of titanium dioxide on the bluestock to allow better visual inspection.En ligne : https://drive.google.com/file/d/1_zws-oYF9FXhhdYFiPZj7j_33Xnx8d2H/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8589
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 1 (01/1991) . - p. 8-13[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006876 - Périodique Bibliothèque principale Documentaires Disponible Results of the hide evaluations from the National Cattlemen's Association "Strategic Alliance Project" of 1993 / Robert G. Koeppen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXXI, N° 6 (06/1996)
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Titre : Results of the hide evaluations from the National Cattlemen's Association "Strategic Alliance Project" of 1993 Type de document : texte imprimé Auteurs : Robert G. Koeppen, Auteur Année de publication : 1996 Article en page(s) : p. 153-160 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The National Cattlemen's Association sponsored the "Strategic Alliance Project" as a direct result of the 1991 National Beef Quality Audit. This was a group effort of the cow-calf producers, a feedlot operator, a packer, a meat purveyor and a retailer to :
1) Produce a group of cattle by State Of The Art methods.
2) Evaluate the quality and costs of these animals.
3) Compare these cattle to a baseline of average lots being produced in the same time period.
This project was managed by the National Cattlemen's Association with the cooperation of the Colorado State University and Texas A&M University (1993).
Fifteen different pens of cattle were assembled at different cow-calf operations, with about 80 to 90 head per pen. The selection was based on similarity of breed, size, confirmation and general health. All pertinent information was tracked from calf through the final evaluations. The fifteen pens were fed at a feedlot in Oberlin, Kansas ant the calves were supplied from locations in Nebraska, South Dakota, Montana and Wyoming.
The target for completion of feeedint was the first to occur with a 0.4 inch backfat (measured ultrasonically) or 1050 to 1150 pounds of live animal weight. All animals were "harvested" in 1993 and evaluated. All of the information was compared on a lot by lot basis. The "baseline" was the production averages on all hides that were processed in the same time period.
The Strategic Alliances Project produced cattle hides that were quite uniform within each individual group, but are quite different from group to group. These differences appear to be primarily due to different genetic origins.En ligne : https://drive.google.com/file/d/1R9oliDqpwhigFFdjxYzkpufAcBKth3B3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7793
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXXI, N° 6 (06/1996) . - p. 153-160[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006945 - Périodique Bibliothèque principale Documentaires Disponible A study of freeze branding : influence of branding conditions on legibility and leather damage / A. L. Everett in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
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Titre : A study of freeze branding : influence of branding conditions on legibility and leather damage Type de document : texte imprimé Auteurs : A. L. Everett, Auteur ; N. W. Hooven, Auteur ; J. Naghski, Auteur ; Robert G. Koeppen, Auteur Année de publication : 1975 Article en page(s) : p. 188-205 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Animaux -- Marquage
Azote
Cuirs et peaux -- DétériorationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Traditional hot-iron branding of cattle produces large economic losses of leather, marginal legibility for ranchers, and excessive cruelty to animals. Substitution of irons chilled in a dry ice-alcohol mixture or liquid nitrogen produces permanent, white-haired brands that are relatively painless and show greatly improved legibility. Furthermore, when properly performed, freeze branding induces minimal scarring of hide tissue and therehy reduces the leather wastage produced hy conventional branding.
To provide further guidelines for improving the technique of freeze branding, a comprehensive, three-year test was performed on 23 dairy cattle and nine beef animals at three geographic locations. The two refrigerants mentioned above were compared in parallel on opposite sides of each animal to evaluate three other primary variables : age at branding, anatomical area, and exposure time. Legibility of each brand was scored after regrowth of hair. Cuttability (usability) of resultant leathers was judged mostly in corrected grain finish, but partially in full grain and in splits after close inspection of crusted sides. It was shown that exposure time, age at branding, and breed type are all critical variables. Although both refrigerants gave equally good legibility, liquid nitrogen (as used after clipping) produced many more bald brands and too much tissue damage for acceptability in leather. Cuttability of the dry-ice hrands ranged from about 25 percent in grain leather to over 50 percent in splits.Note de contenu : - EXPERIMENTAL : Test design - Test cattle - Branding procedures - Legibility scores - Leather scores - Acceptable brands
- RESULTS AND DISCUSSION : Brand legibility - Bald brands - Leather effects - Minor factors - Optimum branding conditions
- Table 1 : Controlled variables in freeze brand test
- Table 2 : Test cattle used at each location
- Table 3 : Influence of time and refrigerant on baldness and legibility of freeze brands on 22 dairy cattleEn ligne : https://drive.google.com/file/d/1sbMCEUuTMHwhV0n-340pPke6ChSD05K0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38786
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXX (Année 1975) . - p. 188-205[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008509 - Périodique Archives Documentaires Exclu du prêt The effect of temperature and mechanical action on salt uptake during brine curing of cattlehides / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
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Titre : The effect of temperature and mechanical action on salt uptake during brine curing of cattlehides Type de document : texte imprimé Auteurs : David G. Bailey, Auteur ; Robert G. Koeppen, Auteur ; S. Wang, Auteur Année de publication : 1990 Article en page(s) : p. 455-464 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effect of temperature on penetration of salt was measured at 36°, 50°, 60° and 80°F. The rate of uptake of salt by samples of cattlehide in saturated brine decreases as the temperature of the brine decreased. Continuous mechanical movement of the hide samples in brine increased the rate of salt uptake compared to static immersion. Data from salt-saturation measurements of more than 50000 commercially processed hides were examined. It was found that more than 75% of the cattlehides cured during the winter months in the colder regions of the country had unsatisfactory levels of salt saturation. En ligne : https://drive.google.com/file/d/1HAA-boHQWTzMBFIOhVROmxW3lmeenyeD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8823
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 455-464[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008090 - Périodique Bibliothèque principale Documentaires Disponible