Does all Artex contain asbestos?
No. But a great deal of it does, and you cannot tell which by looking.
White asbestos was added to Artex until about 1984. Other makers varied, old stock stayed on shelves and in vans for years, and white asbestos itself was not banned until 1999. The safe working assumption is that any textured coating applied before 2000 may contain asbestos until a test shows otherwise.
From chapter 5, Artex and ceilings




