Dating paper ink
We can always have some indication of a starting date for a technique if we can find who first put the idea into practice.
But any technique, once developed, can be used right up to the present - as many collectors know who have been so unfortunate as to rely too heavily on a popular termination date as sure evidence of true antiquity..." (Toulouse 1969b).
The information on this website will, however, usually produce a reliable manufacturing date range for a majority of American utilitarian bottles manufactured from the early 1800s to the mid-20th century.
This mottle is rated visually from a “1” being the best to a “5” being poor. Download here Solid prints are made at a controlled ink film thickness of .05 mils, with temperature neutral ink. This temperature is reported as the maximum temperature that the paper can achieve without blistering. Download here Gloss can be measured at 20, 60, or 75 degrees.Please be aware that in order to gain the maximum information about any particular bottle (e.g., dating, typing) the user must usually must review a number of pages within this website.Unfortunately, the complexities of precisely dating bottles is beyond the scope of any simple key.This test measures the ability of a paper to absorb the thin oils from ink.As the oils leave the ink film, the ink sets and after time, eventually dries.
Download here We always evaluate the uniformity of ink absorption, since mottle on a job is cause for rejection.