A background curve can act like a set of rails to ride while roasting. Roast masters often use a successful past roast as a reference in the background to follow and reproduce. This can be very helpful. Frequently the roasts available to use as a reference suffer from imperfections like RoR curves that show dips, crashes and flicks. A question we are asked is how to use an existing curve to create a "perfect" reference curve, a curve with straight line declining RoR using the event times and temperatures from an existing curve. This article will show one method to create a such a reference background curve.
