Hi Folks, I'm giving a talk to my Camera Club in a few days time, about techniques for converting from color to mono. I always use the channel mixer myself, but I want to cover as many techniques as I can. I'd always assumed that converting to grayscale (image>mode>grayscale) would be exactly the same as desaturate, but I was surprised to find that it isn't. I spent quite a while using the channel mixer to try and replicate the results of converting to grayscale, without success. In case you thought, like me, that grayscale and desaturate were the same, the attached example shows how they're different. In the color image, the background is 128,128,128 (RGB). The colored words have their color settings alongside them. However, if the color channels for each word are averaged, you'll end up with 128. When the image is desaturated (lower right), the words just disappear as they end up the same color as the background. The lower left image is the result of converting to grayscale. Does anyone know what recipe Photoshop uses for converting to grayscale? Thanks for your help Steve PS. Don't take this the wrong way - I'm grateful for your help - but I don't want to start a discussion on the relative merits of the different techniques, there's enough coverage of that elsewhere.