Zipper testing: what EN 16732, ASTM and JIS cover

In short

Zipper quality is measured through strength, opening and closing, colour fastness and dimension tests. Europe uses EN 16732, the US uses ASTM and Japan uses JIS S 3015. Methods differ, so results do not compare directly.

Metal zipper and slider on a jacket
In this article

What gets tested?

  • Crosswise strength of the chain
  • Strength of stops and slider
  • Puller attachment
  • Repeated opening and closing
  • Colour fastness and dimensions

Main standards

StandardWhereScope
EN 16732EuropePerformance levels and test methods
ASTM D2061USAStrength tests
JIS S 3015JapanClass, strength, washing, colour
ISO 10750 and relatedInternationalStops, opening and closing, pullers

Can results be compared?

Not directly, because each standard has its own test methods. When reading a report, check which standard and performance class it refers to.

What is OEKO-TEX?

OEKO-TEX Standard 100 is a voluntary label covering harmful substances. It includes accessories and uses classes from baby products to decoration. Check a certificate's validity and scope on the document.

How to plan testing

Identify the tests your product needs and run your own tests on critical products at an accredited laboratory.

Standards at a glance

StandardRegionScope
EN 16732:2025EuropePerformance levels, test methods, colour fastness, dimensions
ASTM D2061USAStrength tests
JIS S 3015JapanClass, strength, washing, corrosion, colour
OEKO-TEX Standard 100Worldwide, voluntaryHarmful-substance label by product class

EN 16732 replaced its 2015 edition in May 2025. These tests are usually voluntary, but a brand or buyer can require them by contract. Chemical limits such as nickel can be legal requirements; see nickel rules.

What is a performance code?

In EN 16732 the required level depends on use. Intertek's summary of the 2015 edition lists code C for children's clothing, C or D for bedding and B or C for pillows. So there is no single "strong zipper" value; you choose the level that suits your product. Get your buyer's required standard in writing at the start and talk to a test laboratory early.

By: MAK ZipperUpdated: 2 min read
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