IEC TS 63429-2023 PDF

Full title and description

St IEC TS 63429-2023 — Washing machines for household use — Method for measuring the microbiological performance. This technical specification defines a reproducible laboratory test method to measure the reduction of microbial contamination on textile pieces produced by household washing machines and to assess potential cross‑contamination between contaminated and uncontaminated textiles during a washing programme. It is intended for use on appliances within the household‑use scope of TC 59, including washer‑dryers, and explicitly excludes professional, medical or commercial laundry applications and effects arising from antimicrobial detergents or additives.

Abstract

IEC TS 63429:2023 specifies a standardized procedure to contaminate textile test pieces with defined microorganisms, run them through defined wash programmes, enumerate microbial counts before and after washing, and calculate reduction and cross‑contamination metrics. The method is intended to produce reproducible, comparable, relative performance data for household washing machines; it does not make health or disinfection claims and does not evaluate chemical antimicrobial action from detergents, bleaches or additives.

General information

• Status: Technical Specification — published / valid.
• Publication date: 19 September 2023.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 97.060 (Laundry appliances).
• Edition / version: Edition 1.0 (IEC TS 63429:2023).
• Number of pages: 27 pages (official IEC publication).

Scope

The document applies to household washing machines (including the washing function of washer‑dryers) as defined by IEC TC 59. It establishes laboratory procedures for contaminating textile test pieces with specified test microorganisms, running them through defined washing programmes, measuring microbial counts before and after the programme and calculating log‑reduction and cross‑contamination. It excludes professional/commercial laundry operations, medical/veterinary/pharmaceutical applications, and any assessment of antimicrobial action due to detergents, bleach systems or additives; it also does not claim to define sanitization, disinfection or sterilization performance for health‑related purposes. The results are intended for relative performance statements and not for absolute health claims.

Key topics and requirements

• Standardized contamination of textile test pieces with defined microorganisms and inocula.
• Specified wash programmes, machine loading and ballast textiles to create repeatable test conditions.
• Enumeration methods for microbial counts on contaminated textiles before and after washing and calculation of reduction (log‑reduction) metrics.
• Measurement and reporting of cross‑contamination to previously uncontaminated textile pieces within the same wash cycle.
• Exclusion clauses: test does not assess antimicrobial chemicals in detergents/bleaches/additives nor does it establish clinical disinfection claims.
• Requirements intended to yield reproducible, relative performance comparisons between appliances under laboratory conditions.

Typical use and users

Primary users are appliance manufacturers (R&D and QA teams), independent test laboratories and conformity assessment bodies that evaluate laundry appliance performance, standards committees, and academic or industrial researchers studying microbiological removal in domestic laundry conditions. Regulators and product‑marketing teams may also refer to the method for claims verification, with the caveat that regulatory/health claims require separate medical or regulatory assessment.

Related standards

Relevant complementary and adjacent standards include IEC household‑appliance safety and performance standards (for example IEC 60335‑2‑7 covering particular safety requirements for washing machines) and textile testing standards that specify domestic washing procedures (for example ISO 6330:2021 — domestic washing and drying procedures for textile testing). These documents are often used together: IEC TS 63429 provides the microbiological test method while IEC 60335 series addresses safety and ISO 6330 provides standardized textile washing/drying procedures and reference machine types.

Keywords

washing machines; household appliances; microbiological performance; test method; microbial reduction; cross‑contamination; textile test pieces; IEC TS 63429; laundry appliance testing; TC 59.

FAQ

Q: What is this standard?

A: IEC TS 63429:2023 is an IEC Technical Specification that defines a laboratory method to measure how effectively household washing machines reduce microbial contamination on textile test pieces and to quantify any cross‑contamination that occurs during a wash programme.

Q: What does it cover?

A: It covers controlled contamination of textiles with test microorganisms, defined washing procedures and load conditions, microbial enumeration before and after washing, calculation of reduction values, and measurement of cross‑contamination. It explicitly does not evaluate antimicrobial effects of detergents or make clinical disinfection claims.

Q: Who typically uses it?

A: Appliance manufacturers, independent testing and certification laboratories, standards developers, researchers in textile hygiene and product teams preparing performance claims — plus regulators and conformity assessment bodies when assessing relative microbiological performance data.

Q: Is it current or superseded?

A: IEC TS 63429:2023 was published on 19 September 2023 and is the current IEC Technical Specification (Edition 1.0) for this test method. Users should check national adoptions or amendments for later transpositions, but the IEC publication is the authoritative source for the method.

Q: Is it part of a series?

A: It is a standalone Technical Specification under the IEC system addressing microbiological measurement for household laundry appliances and is complementary to other IEC standards for washing machines (for example safety standards such as IEC 60335‑2‑7) and to textile test standards (for example ISO 6330) that define washing/drying procedures.

Q: What are the key keywords?

A: Key keywords are: microbiological performance, washing machines, household appliances, test method, microbial reduction, cross‑contamination, textile test pieces, IEC TS 63429.