Week 13 : 4 Dec 2014 ~ visual technology production

assalamualaikum wbt

Today class was started on 4.30pm. Class start will presentation by selected group. The presentation was concluded about Printing Processing.

Printing is a process for reproducing text and images using a master form or template.

Modern printing is done typically with ink on paper using a printing press. Its also frequently done on metals, plastics, cloth and composite materials. On paper it is often carried out as a large-scale industrial process, and is an essential part of publishing and transaction printing.

Printing technology
- presenter was explain more type of printer like xerox, high speed printer, HP deskjet, solid ink technology printer and so on.
- if you want know detail about printer technology; click here.

Technique of Printing

Press in
Press Out
Silk and lamination
Die Cut
Letter Press
Silk Screening
scalling
Pre-press operation
Foil Printing
Offset Printing
Modern Offset Printing

Digital Printing

Digital printing describes the process of transferring a document on a personal computer or other digital storage device to a printing substrate by means of a device that accepts text and graphic output. As with other digital processes, information is reduced to binary code, or "digitized," to facilitate its storage and reproduction. Digital printing has steadily replaced lithography in many markets, especially at the consumer and business level, as a result of its substantially lower production costs.

Some Advantages of Digital Printing:

Setup costs are lower for short runs
Print only the amount you need, when you need it
Lower minimum quantities (as low as 1, 20 or 50 pieces)
Inexpensive black and white digital printing
Variable data capability (names, addresses, codes or numbering can be done easily)
Improved technology has made digital quality acceptable for more uses

Some Advantages of Offset Printing:

Large quantities can be printed cost effectively
The more you print, the cheaper the price per piece
A large variety of paper types with custom finishes can be used
Special custom inks such as metallic and Pantone colors are available
Highest possible printing quality, with greater detail and color fidelity

Types of Digital Printer

Dot Matrix
Inkjet Printer
Laser Printer

Color modes printing

RGB
CMYK

RGB Color Mode

RGB is the color scheme that is associated with electronic displays, such as CRT, LCD monitors, digital cameras and scanners. It is an additive type of color mode, that combines the primary colors, red, green and blue, in various degrees to create a variety of different colors. When all three of the colors are combined and displayed to their full extent, the result is a pure white. When all three colors are combined to the lowest degree, or value, the result is black. Software such as photo editing programs use the RGB color mode because it offers the widest range of colors.

CMYK Color Mode

Printers print color onto paper using the CMYK color mode only. This 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. When the first three colors are added together, the result is not pure black, but rather a very dark brown. The K color, or black, is used to completely remove light from the printed picture, which is why the eye perceives the color as black.

Why RGB Colors Need to be Converted

The RGB scheme has a greater range of colors than CMYK and can produce colors that are more vivid and vibrant. These colors are beyond the range of CMYK to reproduce and will come out darker and more dull in print than what is seen on the monitor or display. Because the RGB color mode has the full range of colors, documents shown in CMYK mode will always show up precisely on-screen. RGB colors, however, will not necessarily appear in print as they do on-screen. To accurately print the document or image, it must be converted from its original RGB format to CMYK. It is possible to do this by using software such as Adobe Photoshop or Adobe Illustrator.

Why should you care about understanding DPI & Resolution? Because if you are going to print something (particularly of quality) or are ever tasked with optimizing images for the web, knowing a few basics will save you a lot of time and give you the best results.

Alternatively, if you ever hire someone to develop print materials for you or build you a website, they’ll likely have requirements you won’t understand and not everyone is good at explaining them.
Read on for a simple explanation of what you need to know.

It’s important to begin with a high-quality image which means the highest resolution and image dimensions you can get. When it comes to source images, bigger is better, because you can go down in size but not up without losing quality.

Definitions

DPI: Dot’s per inch. The number of dots or pixels in a single inch. The more dot’s the higher the quality of the picture (more resolution, more sharpness and detail,… ).

Resolution: The easiest way I can explain resolution is to say that more resolution means an image displays more detail (or is capable of displaying more detail). Higher DPI means higher resolution. Resolution is not “size”, but it’s often confused with it because higher resolution images are often bigger, but that doesn’t necessarily have to be the case.

Print: 300dpi is standard, sometimes 150 is acceptable but never lower, you may go higher for some situations.

Web: 72dpi or 96dpi. Technically this “old mantra” is misleading, but we won’t get into that level of depth here. Accept it for now and let’s move on.