Why RGB Colors Need to be Converted to CMYK before printing

When a designer designs a album on a computer for printing, or wishes to print images from a digital camera, it is a common mistake to assume that the colors seen on the screen will look the same in print. As a result of this mistake, files for printing are often erroneously sent in the Red-Green-Blue (RGB) format for printing. The issue lies in the fact that the computer screen and many photo editing programs show colors in RGB mode, while images are printed on paper in Cyan-Magenta-Yellow-Black (CMYK) format. Sometimes the conversion from RGB to CMYK works without any problems arising, and a printout will look identical to what shows up on the computer. In other cases, there will be noticeable differences between the shades of color. The key to avoiding this potential problem is to convert all graphics to CMYK format during the layout design phase.

Difference between RGB and CMYK

• RGB (Red, Green, Blue) is the typical color space used by electronic displays, monitors, pda screens, etc. In RGB, images are created by combining red, green, and blue light
• CMYK  (Cyan,Magenta,Yellow,Black) is mainly used by Digital Printers
• RGB colors are are measured in values ranging from 0 to 255.so it can produce colors that more vivid and vibrant
• CMYK color are measured in values ranging from 0 to 100
• In RGB,Red light plus Green light plus Blue light all projected together create white
• In CMYK,Superimpose Cyan ink plus Magenta ink plus Yellow ink, and you get 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

Working Of HP Indigo 7600

Internal Diagram of HP Indigo Press

The Main Components Of  HP Indigo7600 are,

1. Feeder
2. High-speed laser writing head
3. Charge roller
4. Photo Imaging Plate (PIP)
5. Binary Ink Developers (BIDs)
6. Blanket
7. Impression cylinder
8. Perfector
9. Ink cabinet
10. Vision System
11. Proof tray
12. Stacker
13. Imaging Oil Recycling System

Working
1.Charging of PIP which mounted on the imaging cylinder
2. Exposure of the PIP by a scanned array of laser diodes.These laser are controlled by the Raster Image Processor
3. There is one BID for each color. During printing appropriate BID engages PIP
4. Transfer of Ink image from PIP to Blanket cylinder
5. Cleaning station removes any residual ink and charge form PIP
6 Heating of the inked image carried by blanket
7 Transferring of heated ink image to substrate held by the impression cylinder

Why Indot Uses HP Indigo 7600 Digital Press

The HP Indigo 7600 Digital Press, the fastest13 x 19 inch format digital sheetfed press in the market, combines proven quality, versatility, and breakthrough productivity with new intelligent automation that maximizes uptime. New special effect capabilities—including raised print and textured effects—expand opportunities to deliver high-value applications. 

Breakthrough speed and productivity. The press prints four million color pages per month with higher profitability. Using the Enhanced Productivity Mode, throughput increases by 33% to 160 color ppm, increasing volume significantly

New automation. Intelligent automation, powered by an enhanced Vision System, maintains and delivers quality prints, reducing operator intervention. 

New set of special print effects. With new, on-press, on-demand special effects, the HP Indigo 7600 Digital Press is charting new territory, offering outstanding differentiation to the print service provider with a wide range of high-value applications.

The leader in print quality and color. Enabled by HP Indigo’s liquid ElectroInk technology and unique digital offset process, HP Indigo prints are of the highest quality, matching or even exceeding offset, allowing them to be used interchangeably. ElectroInk provides the widest digital color gamut, including special effect inks, using up to 7 ink stations on press

Widest media range. Compatible with more than 2500 substrates, the press enables PSPs to offer unique jobs using dark, transparent, metallic, and recycled papers, and paperboard for folding cartons.

Field upgradeability. Most of the innovations in the press are up gradable options for HP Indigo 7000 and 7500 digital presses.

Designed for the environment. The first HP Indigo press with carbon-neutral manufacturing, it is designed for sustainability at every stage of its life.