DIY tablet computer, maybe.

Gallery, Projects and General > Project Logs

<< < (17/22) > >>

S. Heslop:
So you can get the 3 colours of the CMYK colourspace in paints, called Process Magenta, Process Cyan, etc. Artist paints have some pretty cool names, like Naphthol Red. They all sound so dangerous - way cooler than house paints with fruity names like Cherry Desires and Volcanic Dream.

But yeah if CMYK gives me a value like #00d9cb9c which describes cyan, magenta, yellow, and black then... what about white. Or transparency. Would it just be the 1024 (or 1023. or 1020??) with those 4 values subtracted?

I should pick up some syringes too and experiment a bit!

tom osselton:
I use to be a journeyman offset pressman we had a colour book that told us the ratios, there has to be a chart somewhere on line or possibly from the makers of your paint.

S. Heslop:
That must've been an interesting job. Printing is something I want to try at some point, and I've read a little into lithography and i'm always amazed it works as well as it does even in its basic form. It seems like there's alot to go wrong on a big offset printing press.

As for colour charts. The program I use (and I assume most painting programs) gives you the CMYK values in hexadecimal when you select them.

Now I'm wondering how to best dispense the paints. The obvious way is just a stepper motor and screw pushing a syringe with a narrow blunt needle but i'm not sure how precise that'd be for small amounts. There's plenty to read on dispensing pastes though, between all the solder paste dispensers and ceramic 3d printers out there. I'd also like something that really jets the paints out so they don't ball up on the ends of the nozzles and need wiping.

PekkaNF:
Interesting concept.

You have calibrated your monitor (RGB)?

You realize that diferent color systems (additive vs. substractive vs. paints) can not really be 100% matched and your take on them will depend much from ambient color. Simple test is to mach screen to spraypaint inside (artificial light) and then roll out canavas to evening/morning light and wonder how they look that diferent.

https://www.color-management-guide.com/introduction-color-management.html

Pekka

S. Heslop:
I haven't calibrated my monitor beyond going by eye. I figured you'd need one of those fancy probes to do it properly. It's something i'd also never assigned a huge priority to since the way you see things is very relative. That pen tablet display is a little on the cool side, and after staring at it for an hour and going back to this monitor everything seems quite pink.

But yeah that's exactly the problem i've had in trying to match colours to a monitor. I think the reason still lifes were and still are a popular painting subject is because you can control the lighting for as long as you need to paint. I can think why else the world needs another painting of fruit and vases. Perhaps a smarter way to go about matching a picture would be to print it out and match colours to the print. I still think there's too much Art involved in mixing the colours themselves though. Last night I got a little psyched thinking about this since it went from something I was considering sort of as a joke to something I think could actually be useful.

Navigation

 Message Index

Go to full version