We use both tomato ketchup and curry ketchup as condiments in Belgium. On the curry ketchup label, amongst other ingredients is "curry (1%)".
So I tried adding curry powder to regular ketchup to see whether I could end up with curry ketchup, but I think the taste was off. The colour was close though.
I know "curry powder" is a spice mix that can differ, but is curry ketchup really just ketchup with curry powder added? Or do they mean a bit of a real curry (the dish)? Or are there other differences? Is it possible to make curry ketchup with regular ketchup?