Wash in cold water. Pure modal can be washed in any water temperature, though cold water is ideal. Dry cleaning is not necessary, unlike most rayons.
Use oxygen-based bleach. Chlorine bleach can weaken the fabric, so it should be avoided in the washing process.
Dry on low to medium heat. Make sure you take your items out of the dryer right away—or even when a little bit damp—to avoid wrinkling. Hang up immediately.