The concentrations of constituent substances are calculated based on the content of the product, as it is delivered to the construction site or equivalent. Chemicals that have been used in the manufacture but are not retained in the delivered product shall not be taken into account.
With product we mean any of the three options below.
1. Chemical products
A chemical product consists of a substance or mixture consisting of two or more substances. For chemical products, the content of constituent substances in the product is calculated based on the content of the product when it is delivered to the construction site.
2. Articles
An article is, according to the definition of REACH, Chapter 2 Article 3, an object which during production is given a special shape, surface or design which determines its function to a greater degree than does its chemical composition. For articles, the content of constituent substances in the article is calculated based on the content of the article when it is delivered to the construction site.
3. Assembled articles
An assembled article is an article that has been assembled together by two or more articles, see definition of an article. For assembled articles, the assessment of compliance with the criteria shall be based on the content of the substance(s) in each individual article. The assessment of compliance shall not be based on the content of the assembled article, unless expressed under an individual criterion.
Calculation example
Examples can be found here
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