Black fax to harass large institutions or government departments, to retaliate against the senders of junk faxes, or merely as simple pranks. The basic principle of a black fax can be extended to form a "black fax attack." In this case, one or more sheets are fed halfway through the sender's fax machine and taped end to end, forming an endless loop that cycles through the machine. Not only can solid black be used, but also images which will repeat endlessly on the receiver's machine until its toner runs out. The introduction of computer-based facsimile systems (combined with integrated document imaging solutions)
3D Fax 3D Fax 3D Fax was a computer program for file transfer via fax. The program encoded a file into an image to be sent to the recipient's fax machine. The recipient would then scan the transmitted image and use 3D Fax to decode it back to its original binary form. 3D Fax was developed and marketed in the mid-1990s by a company called InfoImaging Technologies; it ran on Windows. InfoImaging claimed a capacity of 40kB per sheet of paper using its image encoding of files, extended to 110kB (between two fax modems) in the 2.0 version. InfoWorld's reviewer found that