Coraye - The prerequisites (En)

Table of prerequisites

Coraye training

In order to master the use of the software, it is necessary to acquire certain notions on color management and the various functions of Coraye.
To help you, we have created a table listing, by module, the skills you should have acquired.

Basic knowledge to be acquired by module 


Color Capture

Color Table

Gamut Viewer

Print Control

Him Reader

Spectral Viewer

RGB Profiler

CMYK Profiler

Coraye Installation

Light and color



Additive synthesis



Subtractive synthesis



Color communication


The dependent color modes: RGB, CMYK


Independent color modes: Lab, Lch, XYZ


Spectral values



The density


ICC Profiles


Reference color spaces


Non-reproducible colors


The Gamut



The Delta E


The Delta Ch, H, L



How a spectrophotometer works



Standard and Observer illuminants



Modes M0, M1, M2, M3



Presentation of Coraye

Sample measurements


Import swatches into Photoshop and Illustrator



Use a color chart in PhotoShop



Import of color charts in a RIP





Management of color charts



Pantones color charts




Creation of a color chart intended to be printed



Preparation of a color chart for cutting



Preparation of a metallic color chart 



Shade search


Color conversion


Color comparison



Quality control of RGB prints and CMYK proofs



Fogra standards



Spot color control



Cabin control



Brightness, CCT, Ra, CRI



Paper white control



Creation of RGB profiles



Creation of CMYK profiles


Creation of simulation profiles


IT8 type range control



Average of several ranges



Reminders on the basics of color (En)

Reminders on the basics of color (En)

The light + the eye = the color

Color definition

Color is our perception of the different wavelengths that make up visible light.
This set of wavelengths called the spectrum of light ranges from violet (wavelength = 380 nanometers) to red (wavelength = 720 nanometers).
Beyond these wavelengths, the light becomes invisible and we enter the field of ultraviolet (rays responsible for tanning) and infrared or heat radiation.

Three parts that influence the perception of colors:

The light source: emission of a light spectrum
The object : absorbs and reflects a part of the incoming light spectrum
The eye: receives the reflected part of the light spectrum of the object and also portions of ambient light.

Here is the spectrum of lights visible to the eye
Like the rainbow, it stretches from red to violet ranging from 380 nm to 720 nm

The eye is the result of a long evolution of a single skin cell that has specialized in feeling different fringes of electromagnetic radiation.
At the very beginning of evolution, the skin already had a sense of the perception of heat or cold.
When we are in the sunlight, the skin thermoreceptors give us a soft feeling.
It is a sensation caused by an electromagnetic wave called infrared (or heat).
The eye has exactly the same role: to collect information on electromagnetic frequencies, but in a much more elaborate and precise way.
The translation of these radiations by the brain is the sensation of color.
On the object itself, there is therefore no color.
It is simply the molecular structure of the object's surface, formed of bumps and pits, that allows certain frequencies to bounce back.