Double knitting: the What and the How History(ish), Theory, How-to demos

"Double Knitting" has two meanings. It can refer to a weight of yarn, or it can refer to reversible knit fabric. Going forward, I'll call the yarn "DK weight yarn," and the fabric "double knitting." This series is about the reversible fabric, shown here on a sock in progress. SERIES PREVIEWI've said that double knitting is a reversible knit fabric. Usually, but not always, both fabric faces