: Always work in or convert to CMYK (Cyan, Magenta, Yellow, Key/Black). RGB is for screens; CMYK is for ink.
: Include a 3mm bleed (extra design area beyond the final cut line) to avoid white edges after trimming. Keep critical text within a safe area (at least 3mm from the edge). : Always work in or convert to CMYK
If you want to sell custom products (like T-shirts or mugs) without holding inventory: Key/Black). RGB is for screens