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An off-beat design that probably won’t seem out of place amongst colour-geek photographers… Incidentally, the T-shirt can be measured in order to generate an ICC colour profile for T-shirt printing (the colour behaviour will be different on various cloths and as they fade).
If you don’t care too much about colour management, feel free to ignore this. / The current RB T-shirt printing uses 4 inks, and relies on…
If you don’t care too much about colour management, feel free to ignore this. / The current RB T-shirt printing uses 4 inks, and relies on the underlying white cloth to provide a white. The range (gamut) of colours that can be reproduced on a T-shirt with this printer is much smaller than that reproduced on the other RB printed products. How much smaller you ask? If you have a calibrated monitor and use software such as Photoshop which uses ICC colour profiles, here is the answer! / I’ll demonstrate with a few images from my RB portfolio. For each image I’ll show 3 versions: the original (well, in sRGB), as the T-shirt printing would produce it without correction, and lastly as the T-shirt printing will produce it with the corrections I describe further below. / Dolphin Pair / Breakaways at dusk / Snowgum patterns You’ll see that by default purples don’t come out very well! / The 3rd of each of those images is the “corrected” one: the colours are a little faded compared to the original, but not badly. To achieve the corrections, I have generated an ICC colour profile for the current RB printing process. You can download it in a zip file then extract the file RB_whiteT_070615.icc and install it onto your system. Simply copy it into the appropriate directory: WinXP: WINDOWS\SYSTEM32\SPOOL\DRIVERS\COLOR / OS X: ~/Library/ColorSync/Profiles/ or /Library/ColorSync/Profiles/ Photoshop and other profile-aware software on your system will then be able to access the new profile “RB_whiteT_June07” (you may need to restart the software to pick up the new profile). Photoshop workflow: / How you use it is up to you, but my suggestion is to continue to work on your graphics in your favourite profile (e.g. sRGB, Adobe RGB) but before saving the PNG file to upload to RedBubble, make sure you use Convert to Profile… to convert the image into this RB_whiteT_June07 profile. I recommend you use the Perceptual rendering intent. Photoshop won’t attach the RB_whiteT_June07 profile to the PNG file which you upload to RedBubble, but the Convert to Profile step will have changed the pixel values to get the colour approximately correct. NOTE: this profile was measured from a white T-shirt freshly printed by RedBubble in mid-June 2007. It provides us with a starting point for understanding the colour behaviour of the current T-shirt printing service. If/when RedBubble change their T-shirt printing this profile will no longer be valid. Of course the T-shirt printing will fade over time. I may generate additional profiles as this happens, but we’ll see how useful that ends up being. Also note that the T-shirt previews shown on RB will be a bit weird although the T-shirt colour will come out correctly. Using the above 3 examples, the previews on RB would look like: / Hopefully when RB introduces the new T-shirt printing service (which will apparently have its own white ink for consistent colour across all cloths) they will do something to handle these colour conversions automatically behind the scenes as they do for normal prints. Given the above variables, no guarantees are provided that this profile is 100% accurate. But if you’re willing to give this a try with one of your own T-shirt designs, please let me know how you go!
As I described in an earlier journal entry the colours produced by RB’s T-shirt pr…
As I described in an earlier journal entry the colours produced by RB’s T-shirt printing on white shirts is quite different from the sRGB colours we see on our screens. I’ve since measured the colour behaviour when printing on grey shirts, and it’s dramatic. To illustrate this a bit more, I’ll return to the white T-shirt case. Mapping the range of colours that can be reproduced in the “Lab” coordinate system we get shapes like this: / The wireframe is sRGB, while the solid shape is the white T-shirts. It’s easier to see the precise differences when this 3D model is rotated: this is just a snapshot. The ‘L’ axis represents lightness, with black at the bottom and white at the top. The ‘a’ and ‘b’ axes map out the range of colours. / As you can see, the response in the purples is very weak. Now to compare the white and grey T-shirts from the same point of view: / This time the wireframe is the white T-shirt while the solid shape represents the colours of the grey shirts. Let’s look at it from the other side: / Not surprisingly, the grey shirts are much darker. At the same time the colours are significantly less saturated (closer to the ‘L’ axis). Compare the tiny space of the grey T-shirt colours to the relatively massive sRGB space in the first image! The colours currently reproduced on grey T-shirts are very subdued. / I advise that photo printing on non-white T-shirts be avoided at the moment. / The colours reproduced on coloured shirts are just going to be weird (although I haven’t measured them). “Line-art” can obviously be more appropriate, but even then you should be conscious of how the colours in your design will be affected! Cheers
Tee Design by Sanchez
Subway detail plus floor marking, ICC – Berlin
Building detail at night, ICC – Berlin.
The 2IFC and the nearly complete ICC acts like a gate into Hong Kong, or rather, Victoria Harbour of Hong Kong. This was made with two photos stitched together. It is an expected panorama, as I didn’t intend it to be one when I took the photos.
The London Central Mosque (also known as the Islamic Cultural Centre, ICC or Regent’s Park Mosque) is located near Marylebone station, the Baker Street Underground station and Regent’s Park in the City of Westminster, central north London, England. It was designed by Sir Frederick Gibberd, completed in 1978, and has a prominent golden dome. The main hall can hold over five thousand worshippers, with women praying on a balcony overlooking the hall. The mosque holds a chandelier and a vast carpet, with very little furniture. / At the praying area, taken right after Friday prayer. The inside of the dome is decorated with broken shapes in the Islamic tradition. There is also a small book shop and halal café on the premises. The Mosque is joined to the Islamic cultural centre which was officially opened by King George VI in 1944 and was given as an unconditional gift to the UK Muslim community, although the land was donated by George VI in return for a site in Cairo for an Anglican cathedral. Extract from Wikipedia
Oh,my god! Today I got this massege: / *You art work for ICC comic Award 2009 with the theme of Universe and astronomy was selected as an …
Oh,my god! Today I got this massege: / You art work for ICC comic Award 2009 with the theme of Universe and astronomy was selected as an excellence prize award. / You can check the result of ICC Comic award at http://www.intercomicon.org/ I can’t belive! I got an award! 0___0 Yay! / /
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