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"CMYK" Tag


CMYk printing advices:


Tuesday, February 27, 2018

CMYk is color system used for printing. To print an mage, first you have to separate it into four colors: Cyan, Magenta, Yellow and Black.
Each of this colors consists from halftone dots, when dots of different colors overlap each other you can get all colors of rainbow. By using halftones of each colour, we are able to mix various percentages of all four process colours to print a huge spectrum of colours. If you take a magnifying glass to the full colour image, you will see that it is comprised of dots of various process colour. There is a measure of density of this color dots, it is called DPI, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm). If you are printing photo, dpi should be around 300. But if you are printing big board or posters, something that people will observe from the distance dpi can be less than that.

 

Screen Shot 2018-02-04 at 11.02.20 PM

 

In theory, the mixing of C, M and Y should give a black color, but in practice gives a dirty brown. Therefore, the fourth paint is often added black. If we add one or more of the other CMY colours to Black in 4 colour process printing, we get a darker, truer Black than just using Black ink alone. It is called Rich Black. In theory, you can get the richest Black by using 100% of all four inks but in practice, you are limited by how much ink you can lay down on the paper (how wet the paper can get) and the technology used in the printing process. A typical Rich Black mixture would be 50% Cyan, 40% Magenta, 40% Yellow and 100% Black. This produces a darker Black that is neutral in colour. Some other combinations of process colours can produce other looks like “Cool Black” or “Warm Black”. Rich Black should never be used for small type, especially fonts with fine serifs.

 

The CMYK Colour Model


Tuesday, February 4, 2014

the CMYK colour model is short for cyan-magenta-yellow-key (black) and refers to all colours as mixtures of these four process colours. so, within this model, a colour would be described through the quotient of cyan, magenta, yellow and black that can be found in the mixture.

the CMYK colour model is predominantly used in the printing process and is often referred to as four-colour printing (which corresponds to the four inks used). in order to fully understand it, it is vital that we examine another colour model named RGB (red, green, blue) that is used in display devices such as computer monitors. so, whatever you see on a screen is in RGB. however, these colours can only be viewed with the aid of natural or produced light – making it impossible for documents to be printed as exact copies of what can be seen on a screen. this is why these documents must have their colours translated into CMYK prior to sending it to the printer.

all the heavily paraphrased information above seems to make sense on a superficial level, but in fact i find it all extremely perplexing and difficult to grasp. unfortunately i never learned the complex language of science and since it is awfully strenuous to translate a language one doesn’t understand, here is the even-more-technical-side explained by someone who seems to know what they are talking about:

“When two RGB colors are mixed equally they produce the colors of the CMYK model, known as subtractive primaries. green and blue creates cyan (C), red and blue creates magenta (M), and red and green creates yellow (Y). black is added to the model because it cannot be created with the 3 subtractive primaries (when combined they create a dark brown). The K, or “key,” stands for black.” (taken from here)

subtractive-colour_redu

upon my investigation, i found that the aspect of the CYMK colour model that i found most compelling was the simple fact that a countless amount of colours are but a mixture of four: cyan, magenta, yellow and black. this thought was inevitably on my mind for days proceeding my research.

 

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the idea for a translation of the CYMK model came to me when i was listening to Billie holiday’s  1941 version of “am i blue?” over a cup of coffee. it started me off on a long trail of thought which went a little like this:

blue? blue?! how has blue come to mean a sad & melancholic mood or person?

although the colour blue is used to describe a specific feeling, colour can also be used to illustrate mood or atmosphere – for instance – in less direct ways. this is apparent in art, music, poetry, prose… but why do we associate certain moods or meanings with certain colours? and more even-more-generally: why do we often have the urge to illustrate colourless things through colour?

i am extremely fond of the randomness of this occurrence  the randomness of the colour blue (with all its different tones) being chosen to represent something that is beyond blue literally, as a colour, a sensory experience…

 

//

i had the idea of translating the CYMK colour system in a way that i made each colour (cyan, yellow, magenta and black) represent something different. and so i did. i decided that i was going to translate this system into a system that determined the “colour” of one’s day. first, i made a list of things that tend to have an effect on my day. then i selected the four that i felt have the most influence on the “mood” of my day. i proceeded to make them into questions (which can be answered on a scale of 1 to 10):

– how happy/satisfied are you with yourself today? (C)
– how well rested do you feel? (M)
– how good does today’s weather make you feel? (Y)
– how similar is today to yesterday? (K)

each of these questions substitute C, M, Y, and K accordingly. and when answered as a numeral value (from 1 to 10), i have the percentages i need to make a colour with the aid of photoshop. the system i’ve created is therefore a colour-determining tool.

i decided that the colour i’d silkscreen would be the result of my answers to the questions the morning after i created the system. my answers were 5, 5, 3, 1 and made into percentages as shown below:

 

 …and “the colour of my day” beside my silk-screened circle version:

 circle_redu

 

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i knew that to develop my project further i’d have to send this survey around and ask people to fill it out. therefore, i made an online survey using a survey-making-website (which can be accessed here):

 

this website organized the data which i later used to determine individual colours for each of the 40 people world-wide who answered my survey on the 12th of december, 2013. i mapped out all 40 colours to illustrate the colours of one day, according to the answers of 40 people:

colour-system_redu

 

a problem i encountered on two occasions was that if 10 (being absolutely) was the answer to the last question: how similar is today to yesterday? (K), then the colour would be entirely black. since the other quotients would be cancelled out, i didn’t want this to happen. so instead, i set the percentage as 95% rather than 100%. even though both appear to be black anyway, i like the idea that there are still undertones of colour. and although it did not stay completely ‘honest’ to my original system – at the time i thought it would be a good compromise.

 

//

after i was done with the poster shown above, i decided to design a survey of my own (which i would put online and use if i were any good at computing):

i think through this translated colour system, i managed to play on the randomness of colour representations, but also create a functional and fun system (which also has the potential of becoming interactive).

colour-system_total_redu

 


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