Keep grayscale output controlled and consistent with the HP 72 130 mL Gray Ink Cartridge. This OEM supply is intended for HP DesignJet printers that rely on accurate gray reproduction for technical drawings, shaded renderings, and presentation materials. The 130 mL capacity is well suited to teams that print frequently and want fewer interruptions from cartridge replacement. Gray ink plays a specific role in professional output. It helps produce smoother tonal transitions, cleaner neutral shading, and more balanced monochrome graphics than mixing process colors to approximate gray. For organizations that review plans, proofs, and client-facing visuals, that consistency can make a measurable difference in how output reads on paper. Choose this cartridge when you need the predictability of original HP supplies and the efficiency of a higher-capacity cartridge. It is a practical fit for production environments where print quality, compatibility, and reduced service touchpoints justify staying with OEM consumables.