what is the difference between twill fabrics and drill fabrics?

Drill fabric IS twill fabric, both of which refer to the weave. Normal twill’s are a diagonally woven fabric. Usually a 45% angle but can be any where from a 15% to 75% angle. Referred to as steep or reclining. Right hand twill’s include materials such as Cassimere, gabardine and tweed, Left hand twill’s include denim, ticking and DRILL.

 

 

Twill is a widely used weave construction to make variety fabrics like gabardin, denim, jeans, drill etc.