Wine is taken from the bottom casks and is refreshed from a tier above, and so on. The newer wines are blended with the older ones and the original character is preserved. But between the refresher and the refreshed there may be a period of time from the twenty years of gradual blending. Each tier is  in the process of maturing at roughly the same rate, so that the final solera remains consistent in character.

After all the hard work and the years of waiting the wine is ready to bottle. As a final preparation the wine is filtered in a specially designed cylinder containing about 200 rings of coarsely woven cotton (several other models of filters are used). At this point, the wine is squeezed through under the pressure through tightly packed rings and into 1/2 centimetre holes in a tube to the bottling machine.
Corking and labeling are done manually, and one final piece of handwork is the seal of guarantee of quality from the wine institute.