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BS ISO 10195:2018 pdf free

BS ISO 10195:2018 pdf free.Leather – Chemical determination of chromium(VI) content in leather
This document specifies a thermal pre-ageing procedure for leather to obtain indications about the tendency to the formation of hexavalent chromium under specified conditions and the determination of hexavalent chromium according to ISO 17075-1 or ISO 17075-2.
This thermal pre-ageing procedure does not simulate any real condition in leather production or use.
It is applicable to all types of chromium tanned leather.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2418, Leather一Chemical, physical and mechanical and fastness tests一Sampling location
ISO 4044:2017, Leather一Chemical tests一Preparation of chemical test samples
ISO 17075-1:2017, Leather一Chemical determination of chromium(VI) content in leather一Part 1: Colorimetric method
ISO 17075-2:2017, Leather一Chemical determination of chromium(Vl) content in leather一Part 2:Chromatographic method
No terms and definitions are listed in this document.
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A test specimen of leather is heated in an oven for a specified period of time. The sample is then cooled and the chemical determination of hexavalent chromium [chromium(VD)] is carried out according to ISO 17075-1 or ISO 17075-2.
Static oven, capable of maintaining the required temperature within a tolerance of ±2 °C. The oven shall not have a fan or any other air circulating system, nor openings that allow active air exchange. The oven should have an interior made of inert materials. An oven with natural convection should be used.
The oven door shall not be opened during the ageing time. The temperature and humidity shall be checked (5.3) at least three times during the ageing process.
NOTE If the oven with natural convection is kept closed:
一at a temperature of 60 °C, the relative humidity will be physically lower than 20 %;
一at a temperature of 80 °C, the relative humidity will be physically lower than 10 %.
After (24±1) h, remove the Erlenmeyer flask (5.2) from the oven, close it immediately and allow the leather test specimen to cool at ambient room temperature for 2 h±15 min.BS ISO 10195 pdf download.

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