Van Son Holland Ink Corporation has made three appointments in order to strengthen its nationwide dealer network.       David Wallach has been named to the new position of western traditional dealer manager. Mr. Wallach comes to Van Son with more than 15 years in the graphic arts industry, including 10 years with Bell Industries as well as A.B. Dick. Mr. Wallach’s responsibilities include working with established traditional ink dealers and appointing new traditional and BTA dealers with the o...