The Chinese Standard GB 11404 -1989 Textiles – Test for colour fastness – Specification for standard adjacent fabric: Multifibre - is now obsolete.
It has been superseded by GB/T 7568.7, which is based on ISO 105-F10.
GB/T 7568.7-2008 states that the types of multifibre accompanying fabric were changed.
Multifibre SW is replaced by Multifibre DW.
This is available from James Heal either as a roll of various lengths or as pre-cut pieces with gimped edges.
Multifibre SV is replaced by Multifibre TV - also known as American Style 41.
This is available from James Heal as a roll of various lengths or as precut pieces with straight edges.
A PDF version of this FAQ is available for reference.