The effects of finish type on permeability and organoleptic properties of python (Python reticulatus) skin finished leather

Kasmudjiastuti, Emiliana; Murti, Rihastiwi Setiya

doi:10.20543/mkkp.v33i1.1575

Cited by 7 publications

(5 citation statements)

References 7 publications

(11 reference statements)

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“…In addition, a group of five experienced tanners evaluated the leathers using a scale of 1 -10 points for each functional attribute, with greater scores indicating better quality. The mean value of the five tanners was documented for each sample [15].…”

Section: Tanned Leather Propertiesmentioning

confidence: 99%

Bicarbonate Alternatives in the Neutralization Phase of Leather Tanning to Ensure Sustainability

Ali,

Nasr,

El-Shemy

et al. 2024

Text Leather Rev

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The post-tanning procedure involves neutralizing the iso-electric point, which ensures that there is no imbalance between carboxylic groups and amino groups. This balance allows for the penetration of dyes, fatliquoring agents, and other chemical materials. Bicarbonate is used during the neutralization phase, and to eliminate it, 4 metric tons of water are needed for each metric ton of leather. Additionally, this leads to an elevation in both Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). The objective of the research was to substitute bicarbonate with sodium borate, sodium acetate, and sodium formate, and neutralise syntan to decrease the quantities of pollutants generated from this process, minimize the consumption of water, and improve the quality of the produced leather. Each experimental group's BOD, COD, microscopic micrographs, physical, chemical, and organoleptic parameters were determined. The use of sodium borate, neutralizing syntan, sodium acetate, and sodium formate resulted in a significant decrease in the discharge of BOD, COD, and water consumption. Furthermore, the use of 2.5% sodium borate has proven to be the most effective neutralizing agent in reducing water consumption by 80%, total oxygen demand by 39% and costs of neutralization chemicals by 0.62%. Also, the physical and chemical properties of the leather product were similar to those of the control. Therefore, the leather that has been neutralized with sodium borate is considered to have the best organoleptic characteristics compared to the control.

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Section: Tanned Leather Propertiesmentioning

confidence: 99%

Bicarbonate Alternatives in the Neutralization Phase of Leather Tanning to Ensure Sustainability

Ali,

Nasr,

El-Shemy

et al. 2024

Text Leather Rev

View full text Add to dashboard Cite

show abstract

“…Chemical properties of pH, moisture % and ash % content were studied. The organoleptic properties of tanned leathers were assessed by five experienced tanners according to the standard tangible evaluation technique [Kasmudjiastuti & Murti, 2017]. The organoleptic properties included softness, grain smoothness, grain tightness, fullness, and general appearance on a scale of 1-10 points for each functional property (higher points indicate a superior property).…”

Section: Tanned Leather Propertiesmentioning

confidence: 99%

Potential Application of Used Coffee Grounds in Leather Tanning

Nasr¹,

Shaer²,

Abd-Elraheem³

2023

J. Ecol. Eng.

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Safety of environment and human health is an essential requirement of modern industrial techniques. Therefore, using natural agents in tanning industry may emerge as a trusted method to avoid the chemical contamination caused by using traditional chromium salts in tanning process. This study aimed to evaluate the hot water extract of used coffee grounds (UCGs) as a vegetable tanning agent. The collected UCGs were dried and extracted with hot water at 90 °C for 2h. The phytochemical screening properties of UCGs extract were determined. Sufficient amount of extract was prepared to be used in leather tanning. Three groups were tanned with UCGs extract solely at concentrations of 20, 30 or 40% of pelts' weight, while another three groups were tanned with the same concentrations and then re-tanned with 10% of a synthetic tanning agent "Phenol sulfonates". On tanned leathers, organoleptic, physical and chemical properties were determined; scanning electron micrographs were depicted to examine the leather surface and collagen fiber bundles. Analysis of UCGs extract revealed that it has good tanning properties, as it contained tannins (14.92%), tannins/non tannins ratio (2.06), hide powder (39.57) and Stiasny number (21.16). The results of leather properties showed that using UCGs extract alone at concentration of 40% achieved the best results for the vegetable tanning where the tanned leather had higher (P<0.05) tensile strength, tearing strength and shrinking temperature than that treated with the lower level of 20% UCGs extract. However, 40% of UCGs extract is highly recommended to be used to accomplish the required shrinkage temperature that should be ≥ 70 °C. UCGs extract could be successfully used as tanning agent in vegetable tanning to produce durable leathers with good fullness; it may be used for different manufacturing products, such as footwear and bags. Moreover, using a combination of UCGs extract at any of the used concentrations with phenol sulfonates 10% led to significant improvement in all studied traits as compared with using UCGs extract alone.

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“…Chemical properties such as pH, moisture content, and ash content were also analyzed. The organoleptic properties of the tanned leathers were assessed by five experienced tanners using the standard tactile evaluation technique (Kasmudjiastuti and Murti, 2017). These properties included softness, grain smoothness, grain tightness, fullness, and general appearance, each rated on a scale of 1 to 10 points, with higher scores indicating better quality.…”

Section: Tanned Leather Propertiesmentioning

confidence: 99%

Possible Application of Using Modified Black Liquor from Rice Straw in Leather Tanning

El Shaer,

Abd-Elraheem,

Alfawal

et al. 2023

J. Ecol. Eng.

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Ensuring environmental and human safety is a crucial requirement in modern industrial practices. Consequently, the utilization of natural substances in the tanning industry could serve as a reliable approach to prevent chemical contamination associated with the use of traditional chromium salts during the tanning process. This study aimed to assess the potential application of black liquor derived from rice straw as a tanning agent for leather. The black liquor was prepared using the Kraft method, and a modified version called modified black liquor (MBL) was created by gradually reducing the pH from 13 to 7. Subsequently, MBL was employed in the tanning of pickled sheep pelts using four different concentrations: 10%, 20%, 30%, and 40% of the pelts' weight. The physical, chemical, and organoleptic properties of the resulting MBL-tanned leathers were compared with those of leathers tanned with quebracho extracts to evaluate the suitability of MBL as a tanning agent. The findings demonstrated that MBL leathers exhibited slightly lower physical and organoleptic properties when compared to the quebracho-tanned leathers. Increasing the concentration of MBL up to 30% was sufficient to enhance the properties of the tanned leathers, while concentrations exceeding this threshold did not yield any significant improvements in the leather's properties. Consequently, the study recommends the use of MBL in leather tanning either in combination with other tanning agents or as a re-tanning agent to enhance the fullness, smoothness, and overall physical quality of the leather, thereby elevating its overall quality.

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The effects of finish type on permeability and organoleptic properties of python (Python reticulatus) skin finished leather

Cited by 7 publications

References 7 publications

Bicarbonate Alternatives in the Neutralization Phase of Leather Tanning to Ensure Sustainability

Bicarbonate Alternatives in the Neutralization Phase of Leather Tanning to Ensure Sustainability

Potential Application of Used Coffee Grounds in Leather Tanning

Possible Application of Using Modified Black Liquor from Rice Straw in Leather Tanning

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