séchage à l'air chaud

Traductions

• anglais

  Auteur : Office québécois de la langue française, 1983

  Note :

  The following three phases are distinguished in flue-curing: 1) Wilting and yellowing of the leaves. The wilting and yellowing time varies from grade to grade (dark and bright-coloured), harvesting stage and leaf maturity. With a relative air humidity of 80-90% the temperatures which begin with approximately +30° C are slowly raised up to about 33-35° C (fixing of colour), 2) Leaf tissue curing: the relative air humidity is reduced to 40% (with rising temperature) and the temperature is raised every hour by 1-1 1/2° up to about 60° C. This temperature is maintained until the spread-out leaf is completely dry. 3) Stem drying: rapid raising of temperature according to thickness of stem up to 75° C or up to 80° C with less than 40% relative air humidity. The total curing process is completed in 65 hours or more depending on grade and harvesting of tobacco (top leaves). After the stems have been dried, the tobacco is cooled down by opening the ventilations and the consistency of the leaves is restored by supplying moist air and sprinkling the floor with water before the leaves are removed. Conditioning can also be intensified by means of steaming or sprinkling installations. Flue-cured tobaccos belong to the acid type tobaccos; the protein is partly decomposed and the sugar has been preserved. Flue-cured tobaccos need no proper fermentation but only ageing according to the so-called redrying process.

  Terme :

  1. flue-curing