Are you in the future going to do about clipping paths.
Thgis are used for the sending of images on the proffesional machine in the print preparation. This make problems with some type ofmachine but I think on you and will ask divanov who is better expert in print preparation to make detaled answer to you
Well, clipping path is invented for placing just part of image on "page"(in magazine, book, billboard etc.). Because of square shape of images created in Photoshop or similar program, and in need to place irregular part of image, you can use clipping path in Photoshop for placing it in prepress program like Quark, In Design etc. In that way, "clipped" part of image is invisible on edited page, just like the real picture was clipped with scissors and pasted on background paper. It's a little bit complex to create good clipping path, so I need some time to prepare images for tutorial, please be patient, I'll post them in close future.