I do make house calls on occasion and last month I went to the Central State Hospital to help get their archives in order. The collections needed a little help as the staff planned to re-house everything for better storage and since they don't have an archivist or a conservator on staff I was happy to help.
These photos only needed a little bit of mending. I had brought tissue and methyl cellulose and as it turns out, laptops make nice handy weights, when it is time to dry a mend.
It was a long day, but it is fun to get out and see other collections, help other people and think on your feet!
Tuesday, August 10, 2010
Tuesday, August 3, 2010
It is also a great example of the difference in the stability of the two inks, the iron gall ink which was the predominant writing ink for many, many centuries. And carbon black printing ink which was used in the days of movable type.
Iron gall ink is an acidic ink which worked really well when scribes were writing on parchment. Parchment is a relatively thick and tough writing surface and the acid would sink into the parchment and make a very permanent, dark mark Depending on how the ink was made (recipes abound) the ink could be more or less acidic. This didn't matter so much as long as the writing or drawing was on parchment, but then the world switched to paper as the predominant writing surface and the ink proved too aggressive.
The ink corrosion website is one site that documents history and research related to this topic.
Many different recipes were used over the years, and the stability of the ink varies according to the writing surface, storage conditions and handling. Most book and paper conservators will have to make treatment decisions based on the condition of the iron gall ink they're dealing with. In some instances, the ink is stable, and sometimes it has eaten through the paper. There's the permanence of the written word and then there's permanence of the ink.