HP Gloss Enhancer Upgrade Kit (Z9+ only), you can produce images with superior gloss uniformity, from highlights to shadows, and minimize bronzing on most photo papers (except matte-finish papers).
HP 2QX55A Upgrade Kit for DesignJet Z9+ 24-inch and 44-inch Printers
When printing with pigment inks on glossy paper, areas with heavy ink coverage (like dark blues or blacks), can look shinier than areas with light coverage (such as highlights or mid-tones). The 747 gloss enhancer ink lays down a thin, transparent layer across the print surface to even out any differences. Makes the entire image look more consistent, professional, and photo-like.
Also reduces “bronzing,” a phenomenon where metallic-like sheen appears on dark areas when viewed at an angle. Giving prints a more natural, photo-like appearance.
The Gloss Enhancer Upgrade Kit has been designed to be used with an HP DesignJet Z9+ series printer only (does not fit Z6 series)
NB – To fit this unit it is necessary that you order a GREY Ink at time of order, this could be required as part of the install process.