Trás-os-Montes wine is a Portuguese wine region located in the Trás-os-Montes e Alto Douro, the wine region is entitled Transmontano VR, and some areas are classified at the higher DOC (Denomination of Controlled Origin), under the designation Trás-os-Montes DOC.Trás-os-Montes region has vineyards that produces a wide range of wines, and the region has vineyards across a wide range of altitudes.The coolest high altitude produces light bodied wines, when regions width low altitude produces full bodied, and high alcoholic wines.The Trás-os-Montes region has three subregions entitled to the Tras-os-Montes DOC Designation: Chaves, Planalto Mirandês, Valpaços, and produces a wide variety of grapes such as Bastardom Cabernet Franc, Cabernet Sauvignon, Chardonnay, Donzelinho, Pinwürztraminer, Sauotio, Malvasia Fina.The following Tras-os-Montes Wine selection is composed by red wine.The red wine is a type of wine made from dark-coloured (black) grapes, and has a range of colours, deriving from intense violet color derived from typical young wines, brick color from mature wines, and brown color from the most red wines.The red wine production involves picking the grapes by hand or machine, destamming and crushing, involving the mix of individual berries, whole bunches, stems, and leaves, pertinent the must.The must is pumped to a vessel, or a tank made of stainless steel, or an oak vat, for fermentation.With the purpose to prevent oxidation, it is addedSulphur Dioxide when the grapes arrive at the winery, and some winemakers prefer to chill the must to around 10°C (50°F), to allow a period of pre-fermentation maceration ("cold soaking"), of between one and four days.The inoculation and fermentation process to start the alcoholic fermentation, in which sugars present in the must be converted into alcohol with carbon dioxide and heat as by-products.After this process, occurs the separation of solid and liquid phases, where skins float to the surface, forming a cap.Fermentation produces heat and it needs to be controlled by different refrigeration systems to prowl the temperature of 25-28°C; 77-82.4°F.The density and temperature of the fermentation is checked once or twice per day, with the objective to be proportional to the sugar content, falling each day as the sugar is converted into alcohol.A second microbiological transformation takes place after the alcoholic fermentation of red wines, and the red wine is usually racked (decanted) off its lees (dead yeast cells and other solids).Most red wine is aged in stainless-steel or concrete tanks, or in small or large oak barrels for some period before bottling, though this can vary from a few days, up to 18 months or more.Finally the red wine pass through undergo fining, which is designed to clarify the wine and sometimes to correct faults such as excess tannin, and then are filtered to eliminate any remaining yeast cells and bacteria, and then bottled.