Quate from
https://tipking.com/cleaning-tips/ho...shing-machine/Is Velvet Washable in the Machine?
Crushed velvet, polyester velvet, and stretch velvet should all be safe to wash in the machine. All other types of velvet should not be washed unless the cleaning label specifically says so.
While some people have had success washing velvet clothing that has only been dry cleaned, they may not be washing the same item you are. That means you should be skeptical of their words of encouragement. Not every velvet item that needs to be dry cleaned can be washed instead.
Be sure to check out the way to wash it before you decide. Momma never bought velveteen and she never washed velvet.