rustykev91@hotmail.com Posted September 16, 2007 Share Posted September 16, 2007 Can the SeaChanger Wash Instruments be given CMY numbers like the one you can see when in photoshop. this is becasue I am planing on using projection in a show and I may need to add some background color that would flawlessly match the projection? :) Link to comment Share on other sites More sharing options...
paulears Posted September 16, 2007 Share Posted September 16, 2007 The Photoshop system is what printers need, and is CMYK (the K being Black) - and as it relates to pigment with reflectivity, and not filters with absorption. The paint industry uses the RAL number system to reproduce exact colours from cad and graphics packages. So far, nobody has even produced a make for make identical colour system from CMY fixtures. Until they do, any conversion to lighting CMY will be very approximate. Link to comment Share on other sites More sharing options...
Bryson Posted September 16, 2007 Share Posted September 16, 2007 Basically, you'll have to do it "by eye." It's not that hard. Link to comment Share on other sites More sharing options...
slipstream Posted September 16, 2007 Share Posted September 16, 2007 Projection colours are usually spec'd as RGB anyway - thats why commercial printers run a mile from Powerpoint slides are the colours are never right. To explain in simple terms, turn on 100 lights with red , green and blue filters the result is basically white, add the same colours of paint and what you have is effectively black (or dark brown). There is no direct comparison between RGB and CMYK, only the MK1 eyeball stands a chance and thats subjective Sam Link to comment Share on other sites More sharing options...
Wuddy Posted September 17, 2007 Share Posted September 17, 2007 As far as I am aware the SeaChanger uses four infinitely variable dichroic discs in the RYGB areas of the spectrum, controlled by four chanels of DMX to produce any colour mix there ever was, therfore I would think it imposible to provide any coding for the output colours although there is some link with Lee filters so there may be DMX input values to correspond to the Lee catalogue. From experience the only way to find a pigment to match a projected colour is to project the colour onto the surface to be used and then take the pigment swatch booklet and hld it adjacent the projected colour to find a match. Bearing in mind that the pigment match may be miles away from the filter colour. eg. Lee 741 Mustard Yellow, the filter looks positively green to the eye but the light output is akin to orange sodium street light. if you were to select a pigment the colour of the filter you'd be miles out. pigment mixing and light mixing are two completely different processes. Link to comment Share on other sites More sharing options...
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