Archive for the ‘chartex’ Category

Thoughts on heat-assisted removal of Chartex…

November 17, 2007

Although Chartex is described as “removable” in every source I could find that mentioned it by name…it requires heating your object up to 200ºF. That’s 93.3ºC – twice as much heat as is typically used to apply heat-set tissue mends. And after 30-40 years after it’s application, the Chartex adhesive has probably undergone at least some degree of cross-linking. (more…)


Still looking good at 100 years…

November 17, 2007

One of the things I noticed, while at the Cincinnati Art Museum, is that for vast majority of those posters lined with Chartex, the support was still in really good condition. Granted, many of the posters were grimy or slightly darkened/yellowed by time – shop that morning. There was a small group of posters in the Cincinnati collection that had been bound as part of a sample book (by the Strobridge Litho Co.) – they were all lined with a wheat-starch paste and cotton/linen lining. The support on those posters were yellowed, much darker and more brittle than the Chartex-lined posters. And they weren’t necessarily any older than the Chartex posters – in fact, I do recall seeing examples of the same poster in both the sample book group and also lined with Chartex.

From Neil Cockerline’s article:

Even though circus posters were produced by the thousands very cheaply, the materials utilized in their production were of higher quality than one might expect. (more…)

Chartex: What is Known and What Remains a Mystery…

November 15, 2007

So far, I’ve found out the following regarding the Chartex cloth backing:

  • It’s cotton fabric permeated with a wax-based, low-temperature adhesive. Supposedly it’s also “acid-free” – I’m assuming they’re referring to the cotton.
  • It’s removable at 200ºF, according to the directions included with a box of Chartex. But it’s also said to bond at 150-175ºF, so the ideal temperature needed seems variable.
  • It was manufactured by Seal Products Inc. (also called Seal, Inc. in some cases), located in Shelton, Connecticut. (more…)

Photo of a lined poster…

November 15, 2007

This is the bottom right corner of one of the Strobridge Litho. Co. posters at the Cincinnati Art Museum. Note how flexible it is – all of the Chartex-lined posters were very flexible and in really good condition compared to the unlined or cotton-and-starch-paste lined posters.

Hurray for E-Bay!

November 15, 2007

I found a box of Chartex (made by Seal, Inc.) on E-Bay a few weeks ago, and promptly bought it. Well, it finally arrived in the mail and with it a helpful bit of information. On the instruction sheet included with the box, it was found that Chartex can be removed once it is heated to 200 ºF.Box of Chartex.