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.