BOOK DESIGNED BY ALFA KPA 1
HOW 2 PRINT P R E - P R E S S
TABLE OF CONTENTS
4 6 8 10 12
CMYK RESOLUTION DUO TONE BITMAP HALFTONE DOTS
CMYK is a four color mode that utilizes the colors cyan, magenta, yellow and black in various amounts to create all of the necessary colors when printing images. It is a subtractive process, which means that each additional unique color means more light is removed, or absorbed, to create colors.
RESOLUTION DPI stands for dotâ€™s per inch. The number of dots or pixels in a single inch. The more dotâ€™s the higher the quality of the picture which means more resolution, sharpness and detail in the image. When it comes to print 300dpi is standard, sometimes 150 is acceptable but never lower, you may go higher for some situations.
C: 77 M: 54 Y: 56 K: 35
C: 85 M: 33 Y: 45 K: 7
C: 16 M: 89 Y: 98 K: 5
C: 1 M: 15 Y: 40 K: 0
DUO TONE Duotone takes a monochrome grayscale image and allows you to take the tonal range, from lightest tones to darkest, and allocate a different colour to specific part of the tonal range. You can for example make the highlights red and the shadows green. Use a combination called â€œyellow bl,â€? mixing black and yellow to produce a quality tonal. Also experiment combinations of black with medium-blue, cyan, or brown.
C: 0 M: 0 Y: 0 K: 100 8
C: 5 M: 35 Y: 84 K: 0
Photographer Anna Jaquays
BITMAP Bitmaps are defined as a regular rectangular mesh of cells called pixels, each pixel containing a colour value. They are characterised by only two parameters, the number of pixels and the information content per pixel. When the bitmap is a value of 1, it becomes a monochrome, and the palette contains only two entries. With a bitmap of 8, it has a maximum of 256 colors, and the palette contains up to 256 entries. in this case, each byte in the array represents a single pixel.
HALFTONE DOTS A halftone dot is formed inside a halftone â€œcell.â€? The cell is a grid of pixels which takes form of a dot. The cell begins with no pixels turned on and as pixels are turned on, the dot grows until all the pixels within that cell are filled in. For example, if the cell size is 2 pixels wide by 2 pixels deep the halftone cell will contain a total of 4 pixels. As a result the following halftone dot tone values can be created.
In 1440, German inventor Johannes Gutenberg invented a printing press process that, with refinements and increased mechanization, remained the principal means of printing until the late 20th century. The inventorâ€™s method of printing from movable type, including the use of metal molds and alloys, a special press, and oil-based inks, allowed for the first time the mass production of printed books.
“ What gunpowder did for war the printing press has done for the mind. “ ~WENDELL PHILLIPS