Patination and Historic Bottles(10/17/08) The internal and external surfaces of a glass bottle that has been buried (probably a majority of collectible bottles) will usually react variably to the natural chemical processes of decomposition in both water and the earth. This process of weathering is called “patination” in the archaeological world (Jones & Sullivan 1989).
Dating Bottles with the Side Mold Seam–The Myth(9/4/08) One of the most pervasive and longest running myths in the world of bottle dating is that the side mold seam can be read like a thermometer to determine the age of a bottle.(See image #1, which is an illustration pointing out the major “parts” of a bottle, including the side mold seam. Illustration from my Historic Bottle Website – a purely educational website.)