In RIP devices, the Halftone screen dot shape code is required, for example: dot code like postscript language - {abs exch abs 2 copy add 1 gt {1 sub dup mul exch add 1 sub dup mul sub} {dup mul exch dup mul add 1 exch sub}, this code should be for hexagonal dot shape, rotogravur will be used in printing. Me hexagonal code required