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  Horological exterior
Tested components

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Watch case

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Back part

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Bezel

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Crystal

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Crown

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Pushers and correctors

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Dial

n Hands
n Bracelet
n Clasp, buckle

Rotation cycles
on moving bezel

Applied test methods for components

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Water resistance

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Corrosion tests (salt spray, sulphur agents, synthetic sweat, temperature and moisture…)

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Wear tests

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Screw tightness to repeated shocks

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Mechanical cycles on the functions

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UV light test

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Tests on crystal (impact resistance, hardness, scratch test, antireflection coating)

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Opening/closing cycles on clasps

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Mechanical and corrosion tests on metallic bracelets

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Tests on leather and elastomeric straps (see « leathers and polymers »)

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Quantitative measurement of allergenic or toxical compound content (see allergenics and toxics »)

   

   

Water resistance test on a diving model

Tensile/torsion test
on a metallic bracelet

Our sections : 
- Consultancy in
electroplating
- Chemistry
- Chronofiable
- Leathers and polymers
- Materials
- Tribology

Our main services : 

- Allergenics and toxics
- Technical assistance
- Jewellery
- Chronofiable®
- Contaminants, cleanliness
- Corrosion
- Leathers
- JPR Kit
- Electroplating
- Climate tests
- Reliability
- Training
- Horological exterior
- Materials
- SEM
- Metallography
- Watch movements and watch heads
- Polymers, elastomers
- Coatings
- Wear tests

About nickel : 

- Nickel allergy
- Nickel allergy caused by jewels
- European regulation and standards
 
 
Copyright 2007 Laboratoire Dubois S.A.