India Ink is a plug-in filter for paint programs. It converts color or greyscale images into several unusual styles of black-and-white halftones suitable for black-and-white printing. Just put the plug-in filter into the folder where your paint program expects to find it. If you have Photoshop, the folder is Photoshop:Plugins:Filters or Photoshop:Plug-ins. You must restart Photoshop before it will notice the new plug-in. It will appear in the menus as Filters->Flaming Pear->India Ink.