HP Technology

PhotoREt 3.
InkJet printing — the basics
The printed image — both text and graphics — is actually composed of microscopic ink dots. The colour quality and sharpness of the image is determined by a number of factors - the quantity and size of the dots, how precisely they are placed, how they are combined to create colours, as well as the quality of the ink and how well it bonds to the paper or film. Some printer manufacturers make claims that their technology produces better print quality simply by adding more dots-per-inch (dpi). In fact, this is only effective up to a point, and only on coated papers that can handle the greater quantity of ink. HP has a much more effective solution to achieve the highest quality photo printing, even on plain paper - HP PhotoREt 3 Precision Technology.
better way to put ink on paper
Rather than increase the dpi, HP PhotoREt 3 overlays up to 29 ultra-small drops of ink in a single dot location. This enables the printer to produce up to 3500 shades of colour per dot. Traditional inkjet printers produce only 8 colour shades per dot. They must produce most shades through a process called half-toning that produces only a rough approximation of the colour.

PhotoREt4.
high speed photo printingAs HP PhotoREt 4 colour layering technology improves on the printout’s quality through precise layering of dots and through the intelligent use of the 6-ink system, excellent quality is achieved without increasing the dpi used during printing. This has the advantage of lower system processing loads, which in turn speeds up the entire printing process.
how does it work?
HP PhotoREt 4 printers use inks of different intensities (referred to as dye load — the more dye there is, the stronger the colour). This allows each ink tank to produce significantly more levels of colour intensity or shades for every dot. Using HP’s unique colour layering technology to strategically layer multiple colour shades, HP PhotoREt 4 printers produce more than 340 times the number of primary colours produced by PhotoREt 3 printers ? in excess of 1.2 million colours. HP colour layering technology from PhotoREt 4 precisely controls the amount of ink applied to each print position to produce smoother gradations between tones for virtually grain-free images. By layering up to 32 ultra small drops within a single dot, PhotoREt 4 printers require a smaller amount of data than printers needing to process higher dpi, so printing is faster.

PhotoREt Pro
What is 8-ink colour printing with HP PhotoREt Pro?
HP 8-ink colour printing is the new benchmark in photo printing. The highly advanced HP PhotoREt Pro colour layering technology combines up to 32 superfine ink droplets into every printed pixel, for up to 72.9 million directly printable colours and 4097 shades of pure grey. The result is enhanced colour accuracy, improved shadow detail, grain-free printing and a high level of precision.
What do you need to enjoy HP 8-ink colour printing?
8-ink colour printing is achieved by combining three specialised cartridgesTogether, they give you an even wider colour palette for fuller flesh tones, incredible shadows, details and seamless colour transitions.
What are the benefits?
With HPs breakthrough 8-ink printing with HP PhotoREt Pro colour layering technology, you will enjoy:
Studio-quality colour
Stunning black and white photos
Reliable performance and results

HP 8-ink colour printing redefines the state-of-the-art in photo printing. The highly advanced HP PhotoREt Pro colour layering technology produces imperceptible image grain, including images with metallic elements, skin tones and clouds for exceptional studio quality photos.
In addition, HP PhotoRET Pro results in a significantly broader range of colours, including an extensive range of grey tones and dark tones for greater colour accuracy, enhanced shadow detail and artistic impact. Stunning black and white photos
Composite colours are not mixed to create black and white prints. The result is true neutral grey and deep photo black inks. Youll enjoy professional results that bring out the definition, precision and soul in every black and white portrait. Everything is precisely printed without the appearance of distracting red or blue hues.