specific and very fine membrane filter that is highly effective in sterile filtration
A cartridge filter is used in the wine-making operation of filtration, or to remove undesired, cloudy particles from the must or wine. The following types of filters are common; depth or sheet filtration, kieselguhr, membrane or cartridge filters, rotary drum vacuum filter, pressure leaf filter, centrifugation, cross flow or tangential filtration.
a reasonable estimate of the length of time, that a wine remains pleasurable to drink
A reasonable estimate of the length of time, that a wine remains pleasurable to drink, and can be extremely subjective and individual. Yet the main factors are alcohol, residual sugar, acidity, tannin and most significantly, the maturity of the grapes.