john_g
Pooh-bah Hoo-ha
Reged: 09/05/2007
Posts: 2204
Loc: Surrey
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I've wondered about this for a long time...
If I want to do gold or silver lettering, I have to use one of those pens that has gold or silver ink - I don't think I could buy a big bag of assorted felt-tips and mix them to produce the desired effect.
But, when printing photographs, it seems that the printer can conjure gold and silver out of yellow, magenta, cyan and, possibly, black. How does it do this? Or is it just a case of the eye seeing what it expects to see? In what way does gold differ from yellow and silver differ from grey?
Maybe it's to do with the reflectance... ahhhh!!! Have I just answered my own question? Is gold just a shiny yellow and the picture relies on reflections in the gold to fool us?
Does anyone have a better answer?
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John
The best things in life are not things.
http://www.flickr.com/photos/john_gass
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Roger_Provins
Made-it Man
Reged: 22/10/2005
Posts: 2627
Loc: Gloucester, UK
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If you open a photo of your gold bullion  in a photo manipulation program (such as Photoshop) and then use the "eyedropper" tool on a suitable part of the image it will show you the Red, Green and Blue composition of the colour it is reading. Typically R-182, G-160 and B-125 for a sort of gold colour. This is not your entire answer but it may give you a start I suspect the gold and silver pens you mention have minute flecks in the ink to give reflectance.
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Rog
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ermintrude
Hinkypuff
Reged: 30/06/2003
Posts: 12166
Loc: London, UK
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I had a go at that, the eydropper wont work as it will give a pure colour and 'things' dont come out as pure colours. I messed about with a selection of 2 or 3 colours (which you can do via eyedropper) then blurred them. Obvuously print on glossy.
Oh although youre thinking text so pure colour might not matter so much...Still, if you did a layer of the blurred colours then used a mask around the edge of the text so the text itself was translucent and let the mixed colours through?
Mmm OK someone will probably come up with a far more logical method in a minute! 
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Further, longer, higher, older...
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Rhys_Hardwick
enthusiast
Reged: 12/04/2007
Posts: 209
Loc: Cardiff, Wales, UK
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I don't know much about doing this, never having used texture, but isn't there a way you can grab part of the image and make it into a texture. You could then use that with lettering.
Just a thought.
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Rhys Hardwick
www.rhyshardwick.co.uk
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