The Thread to Display Your 1940s Suits

[Marc Chevalier]

Thanks! So, basically, grosgrain has very pronounced ridges whereas barathea has relatively subdued ridges, which run on the bias?

Not exactly. Barathea has a pebbled surface, and grosgrain has a ribbed surface. When the ribs are thicker, it's called grosgrain; when the ribs are very thin, it's called faille.