To print a DWF, right click and choose Print. Using the right click menu Print command prints only the DWF file. If you print using the browser Print command, the Print dialog appears from which you have the option to force the background color of the DWF to white and the color of the geometry to black. The default for HP printers is to use vector graphics. From the Windows Start menu, choose Settings, choose Printers, then modify your printer's properties to use raster graphics instead of vector graphics.
Printing takes slightly longer, but the resulting DWF images look much better.
To save the DWF to your local drive, right click and choose Save As. As command is available once the streaming of the DWF file completes.