A disposable version of the refillable liquid-ink pen that offers the same high quality plots with none of the mess or maintenance associated with the refillable. The DPP(R) is a two-part system comprised of the nib and a pre-filled ink cartridge. Four different styles of ink cartridge are available to enable work on all of the major plotters. Inks are black, permanent, archival, pigmented systems. For Hewlett Packard and compatible plotters. A one-piece pen with a bonded fiber, or nylon plotting tip that produces the brightest looking graphs and charts. Excellent for area-fill applications and the highest quality overhead transparencies. Line widths gradually widen during use. Ink can be used on either paper or water-reactive overhead transparency film. 5-pack.