Under-developed refers to roast problems, usually too-light roasts. If a coffee is not roasted until the reactions responsible for the audible First crack in one of two distinct heat-induced pyrolytic reactions in coffee. It is distinguished by a cracking or popping sound in the coffee, and occurs between 390 and 410 degrees Fahrenheit in most coffee More are completed, there will be Astringency is a harsh flavor sensation, acrid flavor, that provokes a physical reaction on the toungue, the tactile feeling of papery dryness. It can have saltiness, sourness and bitterness as components. It is certainly the More and un-sweet flavors (high Trigonelline is a bittering compound that is reduced as the roast gets progressively darker. Trigonelline is 100% soluble in water and therefore will end up in the cup. Trigonelline is probably the most significant constituent More levels) and a A roast-related flavor, sometimes used negatively, but it can also be a positive flavor attribute. Usually grain flavors indicate a too-light roast, stopped before 1st crack concluded, like under-developed grain flavor. It can also result More The set of flavors that result from the degree-of-roast.: Roast Taste is a term we started to distinguish it from "Origin Flavor". We use the "roast taste" term define the set of flavors that result More.