Editing Rayon (section)

=== Cuprammonium methods ===
{{Main|Cuprammonium rayon}}
[[File:Cu(NH3)4(OH)2.png|thumb|left|Aqueous solution of [[Schweizer's reagent]] or cuoxam]]

Cuprammonium rayon has properties similar to viscose; however, during its production, the cellulose is combined with [[copper]] and [[ammonia]] ([[Schweizer's reagent]]). Due to the detrimental environmental effects of this production method, cuprammonium rayon is no longer being produced in the [[United States]].<ref name="Ohio" /> The process has been described as obsolete,<ref name="Burchard 1994" /> but cuprammonium rayon is still made by one company in Japan.<ref name="bemberg">{{Cite web |url=https://www.asahi-kasei.co.jp/fibers/en/bemberg/sustainability/process/index.html#loop |title=Production System |website=Asahi-Kasei.co.jp }}</ref>{{better source needed|date=August 2021}}

[[Tetraamminecopper(II) sulfate]] is also used as a solvent.