For the majority of Videojet CIJ printers, the recommended distance from the end of the CIJ print head to the product that it is printing on is 3/16” or about 4mm. When the print head is less than 3/16” from the product, the code gets smaller and the printed drops are closer together. When the print head is further than 3/16” the print height becomes taller, the printed drops are farther apart, and the drops land with less accuracy.