cordonnet

[ kawr-dn-et, -dn-ey ]

/ ˌkɔr dnˈɛt, -dnˈeɪ /

a thread, cord, or yarn used to outline a lace motif, form fringes, edge decorative braid, etc.

Origin of cordonnet

From French, dating back to 1855–60; see origin at cordon, -et

The cordonnet of Alençon is the only one which has horsehair for its foundation.

Chats on Old Lace and Needlework |Emily Leigh Lowes
Take two silk threads of the kind sold as "Cordonnet" silk, each thread of a different colour.

Practical Bookbinding |Paul Adam
There were also other differences, both the "cordonnet" and the "rseau" being unlike those of Alenon.

Lace, Its Origin and History |Samuel L. Goldenberg
Is usually worked with horsehair on the edges to give firmness to the cordonnet.

Textiles |William H. Dooley

The pattern is outlined with a cordonnet of a flat, untwisted silk strand.

Lace, Its Origin and History |Samuel L. Goldenberg