The printing of a decoration with the four colour process (yellow, magenta, cyan and black) is not possible in conventional two piece printing. Declining screen values in the printing direction is impossible.
For reproduction of colour images there are print and reprographics restrictions to adhere to in the production of a simplified version of halftones.
Please prepare the artwork based on spot colour.
Technical details for screen resolution
*The resolution is related to the individual picture set up and the number of halftone colours
Example halftones. 4 colours to represent this image on the can.