Lampas nué broché, Livre de patrons Maison Prelle, 1831

Men's jacketFrance, 1715

The Lampas

Originally contested, this name could come from laba or labba, a piece of cloth in French. This sumptuous fabric is fashioned on pickpockets. It is probably originated in China or Persia. The lampas is a fabric assembling silk threads, sometimes gold and silver, the motifs of which are in relief, and known in Europe from the tenth century. It is a cousin of Damascus, the peculiarity of which is the use of two chains, one for binding the weft decoration and the other for the satin or twill bottom. Lampas was very common in France under Louis XV.

To give an exact and definitive definition of the lampas seems to be a challenge, as its variants have been numerous according to places and times.
Here is the definition of a reliable instance:
Historical Museum of the tissues of Lyon:A fabric whose decoration is constituted by floats of weft regularly bound in taffeta or in twill by an auxiliary chain called chain of binding. This decoration is detached on a background produced by the main chain frequently satin, but can be any armor.