Apply halftone pattern to the image to give the it old comic book printing effect.
Go to FILTER > PIXELATE > COLOR HALFTONE. Set MAX RADIUS: 4 and leave the rest with the default values. Press OK and then go to the LAYERS PALETTE and set the BLENDING MODE to DARKEN.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwbOXMrLr_Gn55WzHTHR7OTu8ifxq2sRpv-Q1mSx3aOT4NyyyTxw0pFZ3oUjEYToyzY39TiUJK75gR3oPj0Kb1CUgD9uOBusFQE4yaPJsb1dfhxTBKc1MNiLdYNt3NxrJ543f_yEfLIyw/s400/1.png)
As simple as that