Läderteknik

Ämnesområden: Läder och päls
Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: CEN
Svarsdatum: den 6 okt 2021
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This International Standard describes a test method for the determination of the bending force of leather.

Ämnesområden: Läder och päls
Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: ISO
Svarsdatum: den 17 okt 2021
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This International Standard specifies a method for assessing the propensity of dyes and pigments to migrate from leather to a synthetic substrate by determining the transfer of colour from the leather to white polymeric material in contact with it.
This method is suitable for leather of all kinds at any stage of processing.

Ämnesområden: Läder och päls
Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: CEN
Svarsdatum: den 17 okt 2021
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This International Standard specifies a method for assessing the propensity of dyes and pigments to migrate from leather to a synthetic substrate by determining the transfer of colour from the leather to white polymeric material in contact with it.
This method is suitable for leather of all kinds at any stage of processing.

Ämnesområden: Läder och päls
Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: ISO
Svarsdatum: den 21 nov 2021
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This document specifies a method for the determination of the total metal content in leather using digestion of the leather and subsequent determination with inductively coupled plasma optical emission
spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), atomic absorption spectrometry (AAS) or spectrometry of atomic fluorescence (SFA).
This method determines the total metal content in leather; it is not compound-specific or specific to the oxidation state of the metals.
The method is applicable for determining the following metals:
Aluminium (Al) Copper (Cu) Potassium (K)
Antimony (Sb) Iron (Fe) Selenium (Se)
Arsenic (As) Lead (Pb) Silicon (Si)
Barium (Ba) Magnesium (Mg) Sodium (Na)
Cadmium (Cd) Manganese (Mn) Tin (Sn)
Calcium (Ca) Mercury (Hg) Titanium (Ti)
Chromium (Cr) (except chromium-tanned leathers) Molybdenum (Mo) Zinc (Zn)
Cobalt (Co) Nickel (Ni) Zirconium (Zr)
This method is also suitable for determining Boron (B) in leather.
In the case of chromium-tanned leathers, it is often more relevant to use ISO 5398-1[1], ISO 5398-2[2],
ISO 5398-3[3] or ISO 5398-4 [4].
Interlaboratory test results and the quantification limits possible with ICP-OES are given in Table A.1 and Table A.2 of Annex A.
For the determination of Al and Ti in leather the extraction procedure given in Annex B shall be used.

Ämnesområden: Läder och päls
Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: CEN
Svarsdatum: den 21 nov 2021
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This document specifies a method for the determination of the total metal content in leather using digestion of the leather and subsequent determination with inductively coupled plasma optical emission
spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), atomic absorption spectrometry (AAS) or spectrometry of atomic fluorescence (SFA). This method determines the total metal content in leather; it is not compound-specific or specific to the oxidation state of the metals.
The method is applicable for determining the following metals:
Aluminium (Al) Copper (Cu) Potassium (K)
Antimony (Sb) Iron (Fe) Selenium (Se)
Arsenic (As) Lead (Pb) Silicon (Si)
Barium (Ba) Magnesium (Mg) Sodium (Na)
Cadmium (Cd) Manganese (Mn) Tin (Sn)
Calcium (Ca) Mercury (Hg) Titanium (Ti)
Chromium (Cr) (except chromium-tanned leathers) Molybdenum (Mo) Zinc (Zn)
Cobalt (Co) Nickel (Ni) Zirconium (Zr)
This method is also suitable for determining Boron (B) in leather.
In the case of chromium-tanned leathers, it is often more relevant to use ISO 5398-1[1], ISO 5398-2[2],
ISO 5398-3[3] or ISO 5398-4 [4].
Interlaboratory test results and the quantification limits possible with ICP-OES are given in Table A.1 and Table A.2 of Annex A.
For the determination of Al and Ti in leather the extraction procedure given in Annex B shall be used.

Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: CEN
Svarsdatum: den 30 nov 2021
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This document is a method for determining ethoxylated alkylphenols (nonyphenol ethoxylate [NPEOn with 1 ≤ n ≤ 16] and octylphenol ethoxylate [OPEOn with 1 ≤ n ≤ 16]) in leather. This direct method is especially suitable where a larger number of leather samples are to be checked for the presence of ethoxylated alkylphenols.
This method requires the use of high-performance liquid chromatography (HPLC) with triple quadrupole mass spectrometer (MSMS) to identify and quantify the ethoxylated alkylphenols.
NOTE 1 In the leather industry, the most commonly used commercial ethoxylated alkylphenol has been the NPEO with an average of 9 EO. It has an optimum cloud point in water for the typical leather processing temperatures of 40 °C to 55 °C.
NOTE 2 ISO 18218-1 and ISO 18218-2[1] use different solvents for the extraction of the ethoxylated alkylphenols from leather. Consequently, the two analytical methods are expected to give similar trends but not necessarily the same absolute result for the ethoxylated alkylphenol content in leather.

Kommittébeteckning: SIS/TK 158 (Läder och skodon)
Källa: ISO
Svarsdatum: den 30 nov 2021
Se merSe mindre
 

This document is a method for determining ethoxylated alkylphenols (nonyphenol ethoxylate [NPEOn with 1 ≤ n ≤ 16] and octylphenol ethoxylate [OPEOn with 1 ≤ n ≤ 16]) in leather. This direct method is especially suitable where a larger number of leather samples are to be checked for the presence of ethoxylated alkylphenols.
This method requires the use of high-performance liquid chromatography (HPLC) with triple quadrupole mass spectrometer (MSMS) to identify and quantify the ethoxylated alkylphenols.
NOTE 1 In the leather industry, the most commonly used commercial ethoxylated alkylphenol has been the NPEO with an average of 9 EO. It has an optimum cloud point in water for the typical leather processing temperatures of 40 °C to 55 °C.
NOTE 2 ISO 18218-1 and ISO 18218-2[1] use different solvents for the extraction of the ethoxylated alkylphenols from leather. Consequently, the two analytical methods are expected to give similar trends but not necessarily the same absolute result for the ethoxylated alkylphenol content in leather.