This work addresses ultrafiltration of grape must and the understanding of the membrane/polysaccharides interactions due to the chemical composition of the soluble grape must polysaccharides. The performance of two laboratory-made cellulose acetate membranes was investigated. The membranes have molecular weight cut-off of 96 kDa (CA-400-32) and 31 kDa (CA-400-28). https://macorners.shop/product-category/magnet/