Why do some varnishes such as Acid Catalysed and Inacel take time to dry?
Both Acid Catalysed and Inacel are fast drying products. Nitrocellulose products such as Inacel dry only by solvent evaporation. The time taken by the solvents to evaporate is dependent on ambient conditions. When the ambient temperature is low and relative humidity very high, the solvents take longer to evaporate. On the contrary, if the solvents dries too fast and if the surface temperature is below dew point, condensation of water may occur and cause whitening. Acid Catalysed products dry by solvent evaporation and acid curing. The correct mixing ratio should be used as well as the recommended thinner. Tip: the glue used in some substandard plywoods and medium density boards is sensitive to the solvents contained in Acid Catalysed and nitrocellulose products. The glue softens and makes Acid Catalysed and nitrocellulose products sticky on drying. This is often confused as poor drying times. It is always recommended to make a preliminary test to check. If the glue is attacked, an isol
