A quaker is an industry term to describe under-ripe, undeveloped coffee seeds that fail to roast properly.: A quaker is an industry term to describe under-ripe, undeveloped coffee seeds that fail to roast properly. These are most often the result of unripe, green coffeeGreen coffee refers to the processed seed of the coffee tree fruit. Coffee is a flowering shrub that produces fruit. The seeds of the fruit are processed, roasted,...<coffee cherryOriginally coffee literature referred to the fruit of the tree as a "berry" but in time it became a cherry. It is of course neither. Nor is the... making it into the final product. Normally, these are skimmed off as floatersFloaters are defective coffee cherries or depulped seeds that float to the surface of a water bath.: During the wet-process method, coffee cherry or the de-pulped (without skin)... (in the wet-process) or visually removed in the dry-process method. They are removed on the densityThe density of a coffee bean is often taken as a sign of quality, as a more dense bean will roast more with a better dynamic. The density... table (Oliver table) as well. They occur much more often in dry-process coffees due to the lack of water flotation of the fruit, and the difficult task of removing them visually. Even the best coffees might have occasional quakers, and they can be removed post-roast when they are easy to see. Under-developedUnder-developed refers to roast problems, usually too-light roasts. If a coffee is not roasted until the reactions responsible for the audible First Crack are completed, there will be... coffees do not have the compounds to have a proper browning reaction in the roaster (MaillardAn important reaction in coffee roasting that results in the browning of the green coffee seed.: The Maillard reaction is a chemical reaction between an amino acid and... Reaction, caramelizationA reaction involving sugars that occurs during coffee roasting. A caramelized sugar is less sweet, but has greater complexity of flavor and aroma. Caramelization is slower than Maillard...), so they remain pale in color. My own theory on the term: Quakers are those resist fighting in war, quaker beans are those that resist roasting in the drum; coffee roastingThe application of heat to green coffee seeds (beans) to create palatable material for brewing a great cup!: Coffee roasting is a chemical process induced by heat, by... re-imagined as war? hmmm…