有关orange peel 的成因与喷枪距离目标太远还是太近的问题,书上有一些争议,问了不同的人,也有不同的说法,从一本书上看到这么一段话,对这个问题作出了如下的解释,
The last atomized spray particles to arrive on the wet lacquer surface
have traveled a longer distance between the spray gun and the surface, hence have lost
more solvent, a higher resin concentration and therefore a higher surface tension than the
main bulk of the wet film. The lower surface tension wet lacquer flows up the sides of
these last particles to minimize overall surface free energy; that is, surface tension differential–
driven flow grows the orange peel.
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