BS EN ISO 21530 pdf download

BS EN ISO 21530 pdf download Dentistry — Materials used for dental equipment surfaces — Determination of resistance to chemical disinfectants
Scope
This lnternational Standard specifies test methods for determining the resistance to chemical disinfectants of allmaterials used for external surfaces of dental equipment intended for such disinfection.
Three test methods are specified: an immersion test, a spray test and a contact test. The choice of test methodto be used is left to the discretion of the party conducting the testing.
This International Standard does not address the bactericidal, virucidal and fungicidal effectivity of thedisinfectants.
This lnternational Standard does not provide for testing the possible detrimental effects of applied stress on theresistance of test materials to the test reagents
2 Normative references
The folowing referenced documents are indispensable for the application of this document. For datedreterences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.
ISO 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 1942,Dentistry – Vocabulary
SO 2812-1, Paints and varnishes — Determination of resistance to liquids — Part 1: General methods
ISO 3585，Borosilicate glass 3.3- Properties
ISO 3696:1987, Water for analytical laboratory use – Specification and test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942 apply.
4Sampling
All tests described in this International Standard are type tests
As far as possible, carry out all tests on a representative test specimen of the material from the dentaequipment. Where possible, use flat slabs as test specimens. One of the following options shall be used.
a) Use new parts of dental equipment
b) lf this is not possible, use standard exemplars and test specimens made of semi-finished products (e.gslabs, plates. or round material).
c) Test specimens can also be made by splitting the original parts or semi-finished products (e.g. by cutting or sawing), if the resulting new edges and surfaces of the test specimens are expected to have comparable properties to the original surfaces. The area of the resulting new edges and surfaces should be protected; new surface areas should be a small proportion of the test specimens.
All test specimens should be free from dirt and grease.
5 Test methods
5.1 General
One or more of the three test methods described in 5.4, 5.5 and 5.6 shall be used. The party conducting the testing shall determine which test method(s) shall be used.
5.2 Preconditioning of test specimens
After preparing the test specimens for the intended use, testing shall be carried out under the following conditions:
a) ambient temperature of , according to ISO 554;
b) atmospheric humidity of , according to ISO 554;