Design Best gel colors for true CMY mixing??
- Thread starterleztid
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Your going to get back to white REAL fast. If you want to do this, look at the Cal Color range in the rosco line. Select your saturation and go for it. I have lit shows with these colors. It actually works to a degree, but not like you would expect. For the show I did it with it got me a lot of tropical colors which is what I was going for. You can not use additive color mixing (RGB) though with subtractive colors (CMY) to get the same effect as subtractive color mixing in a moving light. What you actually get is the light quickly goes to white without mixing to anything at most intensity's.
DELO72
Well-Known Member
CMY is not the way you want to go for additive. I agree with Footer. You want to go RGB for a full color range . You can't get Red, Green, or Blue (primaries) if you start with three secondaries. However you can blend to the secondaries if you start with primaries, so why limit your options? Best bet to find three that will blend is to contact the experts at the Gel companies. Sure- you can always eyeball it, but when you have the option to, why not call the Rep from Lee, Rosco, or Apollo and ask their advice on which particular gels they suggest?
I did a demo with a legacy product from our inventory along these lines. It was a gel changer, basically a remotely controlled boomerang, ala a spotlight. I don't remember what gels I used, unfortunately. But basically I found something along the lines of a 1/3 and 2/3 equivalent to cyan, yellow, and magenta. While on paper that would get you a giant pile of colors, we found that it really only got you 10 or 12 really useable interesting colors. Even using this method to get subtractive mixing out of a par, it wasn't terribly effective.
I'd do some playing around with 3 saturate colors, and see if you can find one by trial and error (or, as previously stated, just call your favorite gel manufacturer/supplier) that mixes to the white you're looking for.
Is this for a demo of subtractive color mixing, or for a project?
I'd do some playing around with 3 saturate colors, and see if you can find one by trial and error (or, as previously stated, just call your favorite gel manufacturer/supplier) that mixes to the white you're looking for.
Is this for a demo of subtractive color mixing, or for a project?
As said above, this won't work. Use one fixture with a three-string (Morpheus ColorFader) or two-string (Apollo MXR / Wybron CXI) scroller instead.
However, if you're looking for pure primaries and secondaries, look to the Roscolux / Cinegel line:
#2005 is Storaro Cyan, and #4390, 4360, 4330, 4315, 4307 are 90, 60, 30, 15, and 7.5 percentages.
#2003 is Storaro Yellow, and #4590, 4560, 4530, 4515 ... " .
#2010 is Storaro Magenta, and #4790, 4760, 4730, 4715 ... " .
Storaro/CalColor are also available in Orange, Red, Pink, Lavender, Blue, Indigo, Violet, and Green.
Vittorio Storaro - Wikipedia, the free encyclopedia
Although originally developed/intended for film use, there's no law saying one can't use them in live entertainment lighting applications.
From Cinegel - rosco.com :
Close, and more traditional: R95, R10, R46, but certainly aren't as pure.
JD
Well-Known Member
I think the confusion here comes from the fact that movers have "CMY color mixing." One has to remember what is actually happening inside the light. There are three "flags", one each in C,Y, and M. Each of these flags starts out white at one end and as it rotates more of the color is added. What is sometimes forgotten is that the flags are stacked in series so that the light must pass through all three flags to exit the fixture. This is the "subtractive" mixing. Additive mixing is what you see in a RGB LED fixture. (Sometimes White and/or Amber is added due to the shortcomings of the LEDs by nature.)
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Ric
Active Member
It's not been stated clearly but to do what you're after will require you use Red, Green & Blue Gel, with a single colour per PAR.
Red & Green mixed will give Yellow, Red & Blue mixed will give Magenta/Pink, Blue & Green mixed will give Cyan/Aqua.
All 3 mixed will give white (ish).
We use this principle for our Cyc lighting.
The actual Gel colours you use will be up to personal preference & experimentation, but we use Lee 106 Primary Red, Lee 139 Primary Green, and Lee 195 Zenith Blue.
Red & Green mixed will give Yellow, Red & Blue mixed will give Magenta/Pink, Blue & Green mixed will give Cyan/Aqua.
All 3 mixed will give white (ish).
We use this principle for our Cyc lighting.
The actual Gel colours you use will be up to personal preference & experimentation, but we use Lee 106 Primary Red, Lee 139 Primary Green, and Lee 195 Zenith Blue.
The design was for a ventriloquist show. What I wanted was to be able to see different colored sources for eye candy, but end up with a bright white wash at the focus point. I ended up using R4590 CalColor Yellow, R4390 CalColor Cyan, and L049 Medium Purple as my CYM backlight system. And then R67, R89, and L164 as an RGB toplight system. I was really happy with how it turned out.
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