Viscose fibre swells strongly in water and is weaker when wet, so the knit structure relaxes and shrinks more than cotton. Shrinkage in pure viscose can be noticeably higher, which is why it must be allowed for at cutting.
Blending with polyester or elastane, a denser fabric and good finishing reduce the problem. The result depends on the fibre and the knit; there is no single value. Ask for the shrinkage measured on the real lot and cut with an allowance, not by a generic figure.
viscoseshrinkagefibre
