Sharpness of printed edge lines of 6-point characters on the coated bleached kraft liners (a) bleached kraft liner, (b) coated bleached kraft liner without nano-RHS
(0%), (c) coated bleached kraft liner with 1% nano-RHS coating agent, (d) coated bleached kraft liner with 2% nano-RHS coating agent, (e) coated bleached kraft liner with 3%
nano-RHS coating agent, (f) coated bleached kraft liner with 4% nano-RHS coating agent, (g) coated bleached kraft liner with 5% nano-RHS coating agent.