What is a frit?
Frit (or frits) is a substance, which results from a number of chemical reactions that involve (and fully transform) a mixture of raw materials. Those raw materials are typically metallic oxides. The chemical reactions involved take place during the melting of the mixture at temperatures well above the 1000 °C and the subsequent quenching of the melt; this leads to the immobilization of metal elements in the resulting glassy flakes or granules. During the chemical reaction, the atomic bonds of the raw materials are broken and their elements (metal atoms and oxygen atoms) are completely rearranged within the amorphous structure of the newly formed substance. The main identifiers as included in the EINECS database are:
Substance name: frits, chemicals; EC #: 266-047-6; CAS #: 65997-18-4.
Is the frit a substance or a mixture?
What is the production process used in frits manufacture?
If the frit is a substance, why do I receive from my frit supplier a composition expressed in metal oxides?
Are there any metal oxides present “as such” in the frit?
How does the Safety Data Sheet of a frit have to be prepared?
I receive a Safety Data Shet of a frit with oxides in section 3 is this correct?
Why are there some frits that are classified and others are not?
Frits that are not classified under the above mentioned legislations are considered to be exempted from the obligations of registration under the REACH Regulation.
Why do I receive frits with a REACH registration number and others without it?
Frits are included in Annex V of the REACH Regulation as substance that can be exempt from registration. Certain conditions are necessary to demonstrate the exemption, which include the demonstration that the elements included in the network of the frit do not become bioavailable during the life-cycle of the substance. The work developed by the Frit Consortium and other national associations has demonstrated that certain frits compositions can be exempt from registration, while others have to be registered under REACH.
It has to be noted that exempted frits do not require any kind of classification or labelling.