What kind of white cloth is better for filtering and making a studio?

I don't understand what you're asking. In order to avoid white balance confusion and color temperature interference, it is best to paint the studio with neutral gray close to 18%. "What kind of white cloth is better for filtration?" If it is a soft box, of course, you should choose a material with fine pits, preferably a little thicker, so as to make the light softer.