Viscose Viscose garments can be washed by hand or occasionally machine washed. Hand wash or dry clean will be the safest method. Instructions can vary so be sure to read the care label before washing as viscose as a material can shrink when machine washed. If viscose garment is wrinkled, avoid ironing directly on it. Use a dishtowel when ironing, to avoid direct contact between iron and garment. Viscose garment should be left out to air dry and can be placed on a towel to absorb any remaining water.