In most white wine production, The must is pumped to the press first to express and separate the white grape juice from the skins and the seeds before fermentations. Most winery today use modern pressence not be a bad grades which uses a gentle actions, so it's not to extract too many hot tennents. There also some full of body white wine stalls that may spent sometimes fermenting on the skins, but as a general rule the skins and the seeds known as the pulp are removed by the press from the juice before fermentation.