ditto ... for all pre-washing I "abuse" it ... hot water, hot dryer.
Toss in your colour catcher as your insurance to "know" IF there's any bleeding.
I did some R+Ws this week ... some were a high quality, though the cheaper ones, I expected to bleed.
None bled!
Sometimes we get surprises .... and they don't.
And sometimes the surprise goes the other way, and fabrics I never expect would bleed, do.
Those colour catchers (or Dr. Bechmann's for those here in Canada) are worth every penny ... for insurance!