Thanks guys. No, it isn't smoked. I just went a little overboard with the Annatto. The recipe didn't call for it, but I thought it would look nice with it. The amount I added to my last cheddar seemed a little weak. The cheese is not as orange as the photo shows though.
I'll put it in the brine at lunchtime. I've calculated 10hrs based on a 1.5kg cheese (160mm diameter x 70mm high). Does that sound right? It will be a 22% brine.
Shane