Microplastic, what is the most correct definition?

Microplastic: what is the most correct definition?

The European Commission has requested ECHA to prepare a restriction dossier regarding the use of intentionally added microplastic particles to consumer or professional use products of any kind. For ECHA, microplastic is “a material consisting of solid polymer-containing particles, to which additives or other substances may have been added, and where ≥ 1% w/w of […]