Black/White option Greyed Out

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Switching to RGB seems to be a polular answer but you cannot print in RGB so your image will be degraded just to use the black and white option. Why is it disabled in CMYK print mode?

IMO Black and white is not as straight forward as most would like it to be.

For instance, why wouldn't you convert the image to greyscale and be done with it - or are you talking about the adjustment layer only being 50% so it's kind of a blend between the original colour and b&w?

Depending on the colour of the image, Hue/Saturation can be used, as can Channel Mixer - both give a different result, so it's fundamental to have a good idea of how haltones work and what they're going to actually produce and look like when output.

For me though, I copy the CMYK original, then delete that layer to white. Next I go to channels, select the black channel and paste it there. Then turn all the channels back on and go back to your layers. This produces a CMYK image where only black is present. I use this all the time when doing product images of white products - so when they print they cannot have a colour shift in the printing as there is no colour present. If it is a white product with some colour - like timber inserts on a fan, I do the same steps as mentioned for the white/neutral product, but have a second layer containing the  colour component with the neutral part masked out.

I started out with a photo that is black and white, and RGB originally. I clicked on the b&w icon, didn't see any visible changes. Image looks great onscreen, like the photo I originally started with. But when I print it out, it prints out in kind of a sepia tone. I tried regular paper, glossy photo paper. Same thing happens if I convert the photo to grayscale. Any explanations or help?

HI,

Try to do these steps

-Go to image >mode and change it to RGB color.

Issue resolved

Cheers

Shivam