Silicone product spray handle oil and PU oil difference

Surface spraying is to spray a variety of color effects on the surface of the key, bright fog effect of ink, and then radium carved transparent font or pattern, and finally spray PU or feel oil protective layer.  Hand oil and PU are the most common surface spraying processes of silica gel products, which form a layer of protection on the surface of silica gel products by spraying.  But there are big differences between the two.  

(1) In appearance, the two processes are so similar that many people are confused about their identification.  

(2) From the touch: after oil spraying, the touch feel is fine and smooth, PU spraying, whether fog or dumb surface, the touch feeling is raw and rough.