Relative humidity expresses the amount of water vapor in the air as a percentage of the highest possible at room temperature. The air at 18 ° is the saturated vapor (100% humidity) and causes the formation of condensation in the ISO test, contains 15.22 grams of water per cubic meter. At 30 degrees the air saturated with steam (100% humidity) contains 30g of water per cubic meter. The humidity should be below 50% (very dry air) to prevent condensation in the ISO test (or during a bath at the sea) where the assembly takes place the clock at a temperature of 30 degrees.
In Switzerland, where it snows and the air saturated with moisture in winter to 0 ° C in the factories is heated to 20 °, relative humidity is below 30%, then the assembly is done in ideal conditions.
ειναι ενα απο σπασμα απο το Horological Journal ,μιλαει για την υγρασια,που υπαρχει σε ολα τα ρολογια και τις συνθηκες που θα πρεπει να γινεται η συναρμολογηση.
μιλαει για το water resistant
To avoid the formation of condensation during the test ISO (18 ° C) or more simply during a bath in a swimming pool (usually with water for at least 26 ° C), humidity of the environment in which a watch is waterproof asssemblato not should exceed these values:

ειναι σχετικη η υγρασια,εσωτερικο του ρολογιου κατα την συναρμολογηση/περιβαλλοντος