But perhaps not, some container-method of specific dating subtlety is achievable according to certain cup color for both server-produced and you will throat-blown bottles; understand the Bottles/Cup Tone and Container Typing/Symptomatic Shapes profiles for more information
1. The large majority of machine-made bottles with a slight to moderate lavender or amethyst tint – indicating manganese oxide was used as the decolorizer – date between 1905 and the early 1920s (top picture above right; click small amethyst wide-mouth bottle for a picture of this entire bottle) though some can date as late as the 1930s. Machine-made soda bottles were generally not a).
dos. The enormous most of machine-generated bottle with a soft “straw” colour tint (base image a lot more than proper) – appearing selenium and you may/otherwise arsenic fool around with because a good decolorizer – have a tendency to time zero prior to when 1912 (Lockhart 2006a & b).