HP Plotter Pens 6820 Rapidoplot E Style Pens have Archival Ink for Plotting

Hewlett Packard E Style Fits: HP 7550A. HP 7550B. HP 7570 HP Draftpro. 7580A. 7585A. 7586A, 7595A, 7595B, 7596A, 7596B. 7599A, HP Draftmaster 1.11. MX. RX. 5X. HP Draftpro DXL (7575A). HP Draftpro EXI (7576A). Roland DXY Series. and other similar plotters. The Hewlett Packard Rapidoplot 6820 Series E Style Plotter Pens is a 2-part system comprised of the nib and a pre-filled ink cartridge. Inks are permanent, pigmented systems that conform to standards for archivability. The HP Plotter pens are designed to be used on vellum, bond paper, chart paper, general purpose papers, and drafting film mylar. Ink Characteristics : Archival/pigmented Opacity (black ink): 85% Paper; Copier reduction: Good; Diazo reproduction: Good; Wet-rub resistance: Good; Fade resistance: Excellent; Plotting Speed: 30cm/sec. (paper); 30cm/sec. (film); Pen Down Force:18 grams. Hewlett Packard E Style plotter pens for most hp and hp compatible plotters.