ISO 5433:2022 PDF

Leather — Bovine wet blue — Specification

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Title (English):

ISO 5433:2022

Leather — Bovine wet blue — Specification

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 6
Publication date:: November 18, 2022
Edition:: ISO IS 5433 edition 3 version 1
ICS:: 59.140.30

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Description (English):

This document specifies requirements, sampling methods and testing methods for wet blue leather produced from bovine hides and parts of bovine hides tanned without hair and with the use of basic chromium sulfate as the primary tanning agent.

Technical details

Technical committee: ISO/TC 120/SC 2 - Tanned leather
SKU: ISO 5433:2022

Abstract

Overview

ISO 5433:2022 - Leather - Bovine wet blue - Specification defines requirements, sampling and test methods for bovine wet blue leather tanned primarily with basic chromium sulfate. This third edition (2022) replaces ISO 5433:2013 and provides standardized criteria for raw material, tanning, presentation, chemical limits, shrinkage temperature, fungicide use, sampling, testing, packaging and marking of wet blue bovine hides and parts.

Key topics and technical requirements

Tanning: Must use basic chromium sulfate as the primary tanning agent; visual inspection shall show complete penetration by the bluish chromium color. Tanning carried out at pH ≥ 3.0.
Shrinkage temperature: Measured per ISO 3380. Minimums: ≥ 85 °C for low chrome tannage and ≥ 100 °C for full chrome tannage. Chromic oxide content guidance links to these requirements.
Chemical requirements (Table 2):
- Volatile matter: > 50% of dry mass (or as agreed)
- Matter soluble in dichloromethane:

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Tanning: Must use basic chromium sulfate as the primary tanning agent; visual inspection shall show complete penetration by the bluish chromium color. Tanning carried out at pH ≥ 3.0.
Shrinkage temperature: Measured per ISO 3380. Minimums: ≥ 85 °C for low chrome tannage and ≥ 100 °C for full chrome tannage. Chromic oxide content guidance links to these requirements.
Chemical requirements (Table 2):
- Volatile matter: > 50% of dry mass (or as agreed)
- Matter soluble in dichloromethane:

ISO 5433:2022 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

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