Step 1 – With your RGB document open, go to edit > convert to profile. Step 2 – The following dialogue box will appear. Below the screenshot I will go through the different options you can choose from. Convert to Profile Options
But regardless of what RGB profile you painted in, this is the way to go: save your RGB file. convert it to CMYK and save it as a new file. open both the RGB and the CMYK files in photoshop. set them next to each other and compare the colors. now you have to adjust or saturate some colors in the CMYK file. there’s different ways but a good
If she sent a Photoshop file you can make grayscale in Photoshop. Add level adjustment Move the left slider all the way over to remove any gradiation and make solid black again. Flatten layers Save as tiff You should now have a solid 100% k file Make new illustrator document Place tiff in illustrator