SINGLE KNITTING VS. DOUBLE KNITTING on Knitting Looms
Both of these may be done on looms. Single knitting may be virtually identical to hand knitting on 2 needles. It requires a single row or circle of pegs. Some double knitting boards may be used one board at a time to produce single knitting. The crowning Glory hats pictured above are singlr knitted.

Double knitting is thicker and warmer than single knitting. The gauge tends to be a little bit looser than single knitting if the same yarn is used but it is not see through on account of the 2 layers of fabric. Both faces of double knitted fabric normally look like the knit side of single knitted fabric. This may be altered on purpose with special techniques, but generally, it is true. The snowflake scarf above is double knitted.

Double knitting requires 2 boards that are parallel to each other. The simplest is a purple version by Knifty Knitter. Kiss looms may be used as double knitting boards by removing the pin boards. The KB company made several boards specifically for double knitting. The All-in-One loom by KB may be used for either double or single knitting. Noble Knitter makes some boards that, while mostly designed with double knitting in mind, may be set for single knitting.

Single knitted stockinette always rolls at the edges unless purl stitches are interspersed with knit stitches. Double knitted fabric does not do so. Cables and lace are possible with both fabrics. Shadow work is a technique that I invented and is only possible on double knitting.