>>96536164
That's not what a medium is. A medium is an additive that changes the behavior of your paint. Flow improver, drying retarder, gel medium are all mediums that change the properties of your paint to suit the job you're using them for. Medium can be a binder, which can be matte and thick but also can be a thin acrylic varnish like lahmian medium. Both are binders, and both are mediums