Friday, June 14, 2013

Another RGB test

Different printers give different results. Got two sets of one test printed. One set on the home printer and another from the printing service at Warehouse Stationery.

There's a huge difference in how the colours came out between the two sets. I tested both to see how well coloured light works to make colours appear and disappear.

The home set didn't work as well as the WS set. This may be because the WS set's colour values are much closer to the colours I set on the computer compared to the home set. The colours from WS set are also far more vivid.

Part of this latest set was layering the colours on top of each other as well as testing triples.



Above is an example of the layering tests I did with the triples along with the video of that very same test. The layering I did works in revealing the forms of the shapes when colours appear and disappear. But I think there is a better way to do it. Here I've cut horizontal lines to each colour. The only problem here is that a section of the circle contains no yellow. A better way to do it may be with dots or a different way of setting up the horizontal lines.

The current triples shown here, in this chart are based on the previous test prints, which were done on the home printer.



Since the WS set is shown to be different I printed the full list of seven original colours in addition to cyan, magenta and yellow. Same digital values as the previous one, but printed by WS printer. This is to look for differences and to make the results more up to date. Below is the latest results. The top line refers to colours of light while the rest refer to printed colour. Basically, what happens is some colour turn black and some colours disappear depending on what colour the light is.


Triples are found when they meet these conditions:

-At any one time two of the three colours would disappear on a colour of light.
-All three colours turn black on a different colour of light.

Various triples have been tested but the best is cyan-magenta-yellow. You can see this in the video below.



The first row of colours are yellow, cyan, and magenta from left to right. Note that they all turn black on a different colour. Two of the colours also disappear on certain colours when one is turned black. Although yellow and magenta do darken on blue, the difference in darkness between the two is enough to set it apart from the other triples. With the other triples the difference in darkness is too small.

There were some key differences. For instance, as stated before the cyan-magenta-yellow triple worked most effectively compared to other triples in the WS set. When in the home set it didn't work at all when blue light was shone on it. Therefore, the set to use would be WS as the colours are closer to the values I set. And the triple to use would be cyan-magenta-yellow. Some other triples do work, but not as effectively. For example, some colours would darken at the same time as another. That you don't want.

An interesting thing about the WS set is that purple light turns certain colours (red, orange, yellows) into very bright neon colours (can also see this in the video above). This could be something that we can use if we need it.

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