There are 4 primary colors in printing.
The colors are created with the reflection of one part of the lights exposed to the objects, the absorption (occlusion) of other part. This rate expresses the type of the color.
The process of separating the colors on the original in to four primary colors (CMYK) to print a colored composition is called color separation.
A work goes through 3 phases which are SCANNER-FILM RELEASE-PROOFING to be shot.
All colors are created with a combination of these 4 colors.
Let’s see how the color separation unit is processed with an example:
Let’s assume that a brochure will be made. First, the model, reversal films (dia) and the computer work with low resolution are taken with zip-CD-floppy disc, DVD- hard disk. First, the reversal films and opaque are scanned and cleaned according to the model. The decoupage is made, if any. After these processes, the system work is done if there are any pages requiring system work. The prepared pictures are placed on their positions on the page. Before developing the films, outlet color control is done. The TRAM which is appropriate for the printing paper is selected. For the works that will be sent to the color separation studio, the owner of the work should be informed about where the films are used. If the trams are misused as a result of wrong information or misdirection, the results will be bad.
The use of tram known according to the printing quality
Serigraphy:: less than 34
Newsprint Paper:(Newsprint): 40
İnsert (Lwc): 48 (if the paper is firm) 54
Very Qualified ofset: 80
High Grade:: 54-60
Glossy:: 70 Trams are used and the film output is received.
Some Terms Used in the Color Separation
Tram: The points creating the transitions (tones) (the number of points in 1 cm).
Thread:: Solid colors which do not have a transition tone. Means films done without the use of points.
Degrade:: The soft transition from darker to lighter or from one color to another color.
Decoupage: Cleaning the surroundings of an object as if it wasn’t there.
Extra (Solid):: The special colors printed other than CMYK (silver, gliding, reflex blue, gold bronze, etc.)
Reversal Film (Dia):: Scan able transparent original film. They have sizes such as 2,4 x 3,5, 6x6, 6x9, 13x18.
Opaque:: The original copies of lightproof printed works (Photos printed on cards, pictures taken from newspaper and magazines)
Loop::The special magnifying glass used in color separation.
Photo Shop (System Work):: A special computer program which edits the photos. With this program, desired visual moves can be applied on the photos (for example, giving a mustache to a person who does not have a mustache).Proof "Contact proof"= The process of printing one copy of the current film by using colored folios with a photographic way. (Like Cromolin-Fuji Proof)
HEXATRON: Printing with 6 colors, in addition to CMYK, green and orange are primary colors. The process that moves the trams freely.