ArticleAvoiding Sulfites, Adding CopperWritten by Alison CrowePasteurization operates on a sliding scale and its effectiveness depends on a coefficient between time and temperature.Already a member? Log InYou'll Also Like Article MEMBERS ONLY Vineyard Planning, Varnish on Mini Barrels, Macerating Skin Packs, and Degassing Wine A proud new owner of a sulfite test kit wants to know how often to test. The Wizard also answers questions on backyard vineyard planning, urethane coating on an oak barrel, extended maceration on a kit’s skin packet, and degassing wines. Article MEMBERS ONLY Chlorine Conundrum & Country Wines: Wine Wizard I never use any chlorine-containing cleaning compounds in my winemaking and don’t recommend it to anyone. There are plenty of alternatives for cleaning, one of my favorites being sodium percarbonate.