Just a minor problem that cropped up yesterday.
I sub-print designs onto 100% polyester totes that are a 'natural' base colour, not white. This is fine for most of my designs, which look great when printed.
Yesterday, however, I printed a design I've never done before that had medium-grey text, and it turned out green! This is, of course, down to the inks being semi-transparent and the base colour showing through. It got me wondering though whether it is at all possible to print grey on these bags. I doubt whether tweaking an ICC will do it. Has anyone ever achieved this? I think it's impossible.
What I've now done is to add a yellowish overlay on all my designs (for viewing purposes only) in Photoshop so that I can see more clearly how they are actually going to print and can alter my product mockups accordingly, to give customers a truer representation of the colours.