RGB verses CMYK Colours

August 23rd, 2011

To colour print your digital files, you need to supply the graphics and images in the correct colour mode. Most of the software programmes allow you to work with RGB colour mode or CMYK colour. RGB colours or Red-Green-Blue colours are known as the primary colours of the light. This colour combination can be seen on your t.v. or computer monitors. The digital cameras and scanners also make images using Red-Green-Blue colour combinations. Red-Green-Blue colour mode should be in use when taking photos that need to be viewed on a monitor, or by emails or CD.

All colours of the light spectrum are formed from the primary colours, but monitors can display only limited colour range from the visible spectrum. Light is sent from the monitors, and the printing ink recognizes only a certain wavelength of colours. The three primary colours are combined together to produce white colour. If the three primary colours are absent, the light will appear as black. By combining a variety of intensities of RGB colours, each combination produces different colours. The monitor of a tv or a computer is made up of small units known as pixels. Each pixel contains three units of light, and each unit represents red, green and blue.

You can not actually see the individual pixels with the naked eye because they are so tiny. Each pixel is made by the application of correct values of RGB, and without the proper values of the colour units, you cannot see any image on the screen. The values of RGB colours are calculated mainly by three methods. The first method is to set them with the help of different numeric values. The numeric values used for this purpose are the values from 0 to 255, and this is the superior method of the three.

The second method is by using hexadecimal notations. This method is mainly used for HTML and other languages of the computer. These notations follow a logical pattern. The hexadecimal notation consists of six characters, with these characters being divided into three. The first pair represents the red, the second pair green and the third pair as blue. Each pair is represented by a hexadecimal number (0-9) and the letters (A-F). The third method is the percentage in which a certain percentage represents each colour. The program translates these percentages into suitable values ranges from 0-255.

CMYK colours or Cyan-Magenta-Yellow colours are subtractive colours, whereas RGB colours are additive colours. Additive colours are referring to light, whereas subtractive colours refer to inks, paint or pigment. CMYK mode is used for printing as all kind of printers use subtractive colours to result in different colours. When three additive colours are combined, the combination will produce white colour. But when three subtractive colours are combined, the combination produces black. This difference develops a wide diversity between the resulting print and the onscreen display. Additive colour projects the light from the monitor, and if more light is projected from a specific pixel, it will be closer to the pure light. Regarding printer inks, they absorb light and reflects only the wavelengths of light that is linked with the colour of the ink.

The inks of the printer take away the non-essential wavelengths from the light that falls on the ink. The remaining light will return to our eyes, giving the impression of a variety of colours. If you are combining even more colours, then more light will be absorbed by the ink and a lesser amount of light will be reflected to your eyes, and that results in darker colour. Black ink produced by the CMYK colours is not a deep black. So you need to add black ink to get the best results for receiving true black. To receive a stronger tone of a colour, you need to add black in CMYK mode.

What about the lighter shade of colours? As white ink cannot be created using CMYK colours, you have to work with the hypothesis that you are printing the colours onto white paper. As small dots of ink are used to print images the inks are used in a lower percentage to receive lighter shades so that more white is seen among the dots. The values of CMYK colours are calculated using four different percentages. The values of each percentage should be between 0 and 100 so that the total percentage of the ink values can be up to 400%. But if the total percentage reaches 400%, the ink takes more time to dry. And so, the total percentage of the ink shouldn’t be more than 300% in CMYK mode.

Both colour modes have their own limitations. The images developed using RGB mode can’t be converted smoothly into CMYK mode due to the brightness of the RGB colours. Similarly, CMYK colours can’t be converted into RGB mode because the sharp look of RGB colours is missing in CMYK mode online. This is the reason why RGB colours are used in monitors and CMYK colours are used in printers.

Looking for Logo Design Brisbane or Graphic Design Brisbane? Bydaughters can help you create a cut-through brand. Bydaughters is also a Brisbane Web Designer of notable talent.

Sphere: Related Content

Categories: Uncategorized | Tags: , , | No Comments

The Best Natural Deodorant Alternatives

February 21st, 2011

While perspiration is a natural process that the body has to undergo to release toxins and is the body’s means of thermoregulation, excessive perspiration can be quite embarrassing, particularly in social situations. It has become common practice for people to apply deodorant for hygienic purposes to prevent underarm sweating and body odour. However, medical studies have shown that using deodorants made with certain chemicals which prevent sweating can cause cancer and other illnesses that can lead to death.

These findings have resulted in an growing concern with regard to the use of chemically manufactured deodorants. These deodorants often contain harmful aluminum salts, which block the flow of sweat by clogging sweat glands, talc, a fine powder that is known to have natural absorbent qualities and Triclosan, a synthetic antibacterial agent. While all these products certainly result in reduced sweating, they have all been found to be carcinogens.

If you would like a natural alternative that gives you the refreshing effect of a deodorant without the detrimental side effects, you can opt to use a crystal body deodorant, a non-toxic alternative to conventional deodorants. This type of deodorant is made of a blend of mineral salts and do not contain any synthetic materials. Traditionally, this type of deodorant was only available in pieces of rock but now they are also available in sprays, sticks and roll-ons, and have the additional advantage of being unperfumed, so there is no competition with any other fragrance being used.

If you don’t want to risk developing cancer by the use of conventional deodorants then you can switch to crystal deodorant now. It is very simple to use: You must add a tiny amount of water to the crystal and then simply apply it to your underarms, and another bonus of being able to use using the crystal on other areas of the body, including the feet. The best results are obtained when it is applied for over ten seconds.

With this kind of deodorant, application must be made right after bathing to prevent sweating, as it does not work if perspiration has already begun. If you want a more modern way of applying crystal deodorant then the options are to purchase it in a roll-on or spray bottle.

There are also several other options available if you want to choose a chemical-free deodorant; a lot of deodorants are available which are made of all-natural herbal ingredients to address the knowledgeable consumer’s need for chemical-free products. Natural cosmetic brands have released several kinds of deodorant including farnesol, an organic substance that occurs naturally in essential oils such as musk and roman chamomile.

There are numerous advantages in using natural deodorants instead of those which are chemically manufactured. You can reduce the risk of cancer and other medical conditions that result from chemical exposure.

If you’re looking for a sweet-smelling Brisbane web designer for web design Brisbane, contact bydaughters.com

Sphere: Related Content

Categories: Uncategorized | Tags: , | No Comments