Some pieces in the room carry silk as well as wool. It is used sparingly: for the outline of a medallion, for the small flowers inside a border, or for a single motif that the weaver wanted to catch the light. Silk takes dye more brightly than wool, and it reflects, so a silk highlight reads as a slightly different colour from every angle you look at it.
The note handles silk in two ways. It says where the silk sits, using the words above: in the field, in the main border, in the guard stripes, in the outlines. And it says, in words rather than a percentage, how much of the pile it makes up: a few motifs, the outlines only, or scattered through the field. We do not weigh it and we do not put a number on it, because the number would be a guess dressed as a measurement.
Silk highlights also wear differently. Silk pile is finer and lower than the wool around it, so on an older piece the silk motifs can sit visibly below the wool. When that has happened it is written in the wear line, with the pile height given at a silk motif as well as in the wool.