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Black and white ICC profiles

On black and white printing, the use of specific profiles permits to neutralize grey axis, to adjust grey scale on white paper one’s and to significantly reduce metamerism, colored dominants or colored swings. These profiles can be used for monochromatic pictures data printing and RVB.

 

   Black & white Pack

Black & white Pack

From very cold to very hot through light cold, neutral or light hot, you can face to any creative envy with the Black and White pack. This pack provides 5 personalized ICC profiles for black and white editions with colored bends.

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   Good to know

Epson 3800

Every printer generation improves black inks neutrality. With the apparition of grey ink cartridges on certain models, the use of optimized profiles for digital black and white editing become really effective.

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   Black & White Custom iCC Profiles

In black and white inkjet printing, colored inks as cyan, magenta, yellow and black are mixing on the paper to give a monochromatic editing. Even if this monochrome is visually neutral, it is actually the result of an accurate mix of the inks contained in the printer.
This inks synthesis doesn’t make easy the obtaining of neutral and well-balanced editing when black and white printing. At least to use a specific profile intended to this kind of printing.

Black and white ICC profiles

Neutralizing and linearizing neutral grey axis

Black and white printing with cyan, magenta, yellow and black inks is obtained by synthesis (mix) of these primary colors. That’s why when creating a black and white profile, the ICC chart for printing is made of grey levels patches, patches close to the neutral grey axis and colored patches. Analyzing this chart permit optimization of the printer rendering in sight of black and white printing.

By linearizing and neutralizing the rendering, the goal of this optimization is to not compromise quality or neutrality of the print. Linearization will permit to space out and to organize in a regular way the grays (from white to black) through several intermediate levels. The objective is that 2 really close grays keep a certain interval. This interval is regularly repeated along the grey scale.

Linéarisation
Grey scale correctly linearized.

 

Neutralizing the grey axis is as many important as linearization. We need to equilibrate the inks mixes to obtain levels of correct neutral grays. This means: Avoiding colored dominants on prints.

Colored dominant

The colored dominant represent the difficulty to obtain a print perfectly neutral when ink-jet printing. It modifies picture’s tonality.

But in an artistic goal, a dominant could be voluntary. That’s why our black and white profiles pack contains 5 different profiles, from very cold to very hot, through light cold, neutral and light hot.

So, it’s not the printing hazards which make the dominant, but it your own choice to print neutral, hot or cold a kind of subject.


Tuning high lights with white paper

Every kind, every trademark or model of paper renders his own white. For example, papers with no bleaching agents are a few hot. At the opposite, those with bleaching agents are cold. We can speak here of white paper color temperature. It can be measured with spectrophotometer.

When black and white printing, all the paper’s area aren’t covered with ink. It is in these areas where it is important to respect the paper tonality. It means to make those high lights tonality to coincide with the natural tint of paper.

In the opposite case, there is a high level risk of tones break in the gradations of the brighter areas of the image: white paper tonality and tonality of the brighter grays differ. Some parts of the picture can be out of continuity.

On black and white printing, it’s essential to make corresponding profile tonality with the white tonality of the paper. That’s why an ICC profile with grey scale tonality coinciding with the white of the paper should be created: a profile especially adapted to black and white printing.

 

Optimizing print density

On a large format as well on standart inkjet printers, it is often delicate to obtain quickly black and white printings with optimum density. Too much ink, not enough, a little bit too much ... tests can be numerous and unsure before having good results.

The use of a profile dedicated to black and white printing adjusts this problem. Indeed, it permits to establish the best specific ink rate of the paper used to obtain immediately optimum black and white printings.

 

Optimizing ink rendering

On black and white printing, inks characteristics can lead to a degradation of the observation of the prints. But the ink generations followed another, these phenomenon are strongly reduced. But it can be more or less visible according to the quality and the kind of the ink used by your peripheral.

The two mains are metamerism and colored swings. It is good to know that an ICC profile dedicated to black and white printing can strongly reduce them.

Metamerism is a modification of the visual perception of colors according to illumination. When 2 surfaces seem to have same color under a certain light but different colors with another one is metamerism .It is linked with technical properties of the inks. They are more effective concerning rendering and quality but still can suffer of this metamerism, which is reducing at each ink generation.

Specific dominant

Another effect in black and white is, in a same image, a specific dominant in the opposite shadows to a complementary dominant in the high lights.

For example, an image with a red dominant in the shadows with a green dominant in the high lights. Black and white profiles are perfectly well balanced on and around the grey axis to avoid this phenomenon.

 

 

 

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