ISO 10195:2018

Overview

ISO 10195:2018 - Leather - Chemical determination of chromium(VI) content in leather - Thermal pre-ageing of leather and determination of hexavalent chromium - specifies a controlled thermal pre-ageing procedure to assess the tendency of chromium‑tanned leather to form hexavalent chromium (chromium(VI)). The standard defines how to pre-age leather samples thermally and then determine chromium(VI) levels using the established chemical methods in ISO 17075‑1 (colorimetric) or ISO 17075‑2 (chromatographic). It is applicable to all types of chromium tanned leather and is intended as an indicator test rather than a simulation of real-use conditions.

Key topics and technical requirements

• Purpose: Provide indications of a leather’s tendency to develop hexavalent chromium after thermal stress.
• Pre‑ageing conditions: Two defined temperature regimes:
  • (60 ± 2) °C, relative humidity physically < 20 % - general purpose (gloves, garments, leather goods).
  • (80 ± 2) °C, relative humidity physically < 10 % - for leathers exposed to critical manufacturing/transport conditions (footwear, automotive, upholstery).
• Duration: (24 ± 1) h in a static (non‑forced‑air) oven with natural convection.
• Sample preparation and mass: Sampling per ISO 2418; specimen prep per ISO 4044; test portion (2.0 ± 0.1) g cut into 3–5 mm pieces and placed in a 250 ml Erlenmeyer flask.
• Apparatus: Static oven (±2 °C tolerance), 250 ml Erlenmeyer flask, temperature/humidity measurement, analytical balance (0.1 mg accuracy).
• Analysis: Immediately after cooling, determine chromium(VI) per ISO 17075‑1 or ISO 17075‑2. Calculation and reporting follow those methods.
• Test report must include: reference to ISO 10195, leather description and sampling, selected pre‑ageing method, measured hexavalent chromium amount, and the analytical method used.
• Informative annexes: Annex A (inter‑laboratory accuracy data) and Annex B (natural ageing observations).

Applications and users

• Manufacturers and tanneries assessing product quality and risk of chromium(VI) formation after thermal stress.
• Quality control laboratories conducting compliance or internal screening tests for chromium(VI).
• Product specifiers in footwear, automotive, upholstery, apparel, and leather goods who require pre‑ageing indicators for procurement or safety specs.
• Regulatory and testing bodies referencing objective pre‑ageing protocols when evaluating chromium(VI) risks in chromium‑tanned leather.

Related standards

• ISO 17075‑1:2017 - chromium(VI) colorimetric determination
• ISO 17075‑2:2017 - chromium(VI) chromatographic determination
• ISO 2418 - sampling location for leather tests
• ISO 4044:2017 - preparation of chemical test samples

Keywords: ISO 10195:2018, chromium(VI), hexavalent chromium, thermal pre-ageing, leather testing, ISO 17075, chromium tanned leather, leather quality control.