Impressions in Print 


When supplying digital files for full colour printing, it is important you supply images and graphics in the correct mode or colour space. Many software programs give you the choice to work in either the RGB or CMYK mode.. 

RGB stands for Red, Green and Blue which are the primary colours of light. Scanners and digital cameras generally create images using combinations of the three RGB colours. When you save a scanned picture, or image taken with your digital camera, it normally will be saved in RGB mode unless otherwise specified. In addition, computers display images on the computer screen as RGB colours.

Printing presses print full color pictures using a different set of colors than RGB. Generally, full colour images are created using the primary colors of pigment: Cyan (blue), Magenta (red), Yellow and Black - otherwise known as "CMYK printing" or "4 colour process". By combining different percentages of the 4 CMYK inks, the illusion of continuous tone in images is created.

At some stage in the design process, your images must be converted from RGB to CMYK in order to print them on a printing press. Unfortunately not all colours in the RGB spectrum can be replicated in CMYK. Such colours are said to be "out of the CMYK color gamut". When converting from RGB mode to CMYK mode, software programs get as close to original colour as possible. Some colours convert very well whereas others do not. Below is an example of colours that do not convert well from RGB to CMYK.

Do not be alarmed by the example above, as most photographic images usually convert quite well. Below is an example of converting a photograph. You can hardly see a change in colour. Generally, it is in extremely rich and vibrant colours where you may see the most colour shift.

Please convert all images and graphics to CMYK prior to sending your files to us. You will have more control over the appearance of your printed piece as you will see how the images look once they are converted. If need be, you can always adjust the image slightly after conversion to more closely achieve the desired colour. If we receive RGB images from you, we will do a standard conversion to CMYK, however our results may vary from yours.

For best results, we recommend working in CMYK mode whenever possible. Some applications like Photoshop and Illustrator actually allow you to work in different modes so be sure to choose the correct one!

"CMYK" redirects here. For the Ladytron song, see Witching Hour.

The CMYK color model, referred to as process color or four color, is a subtractive color model, used in color printing, also used to describe the printing process itself. CMYK refers to the four inks used in most color printing: cyan, magenta, yellow, and black. Though it varies by print house, press operator, press manufacturer and press run, ink is typically applied in the order of the abbreviation.

The “K” in CMYK stands for key since in four-color printing cyan, magenta, and yellow printing plates are carefully keyed or aligned with the key of the black key plate. Some sources suggest that the “K” in CMYK comes from the last letter in "black" and was chosen because B already means blue.[1][2] However, such explanations are likely inaccurate, plausible inventions of authors unfamiliar with traditional printing technology.[3]

The CMYK model works by partially or entirely masking certain colors on the typically white background (that is, absorbing particular wavelengths of light). Such a model is called subtractive because inks “subtract” brightness from white.

In additive color models such as RGB, white is the “additive” combination of all primary colored lights, while black is the absence of light. In the CMYK model, it is just the opposite: white is the natural color of the paper or other background, while black results from a full combination of colored inks. To save money on ink, and to produce deeper black tones, unsaturated and dark colors are produced by substituting black ink for the combination of cyan, magenta and yellow.

This is the first blog that i created. 

Pls feel free to comment on my blog.