Hi Karin this 2007 publication might be useful http://www.treesearch.fs.fed.us/pubs/30670 Luba Luba Dovgan Nurse textile conservator Denmark On Thursday, 31 January 2013, Karin von Lerber wrote: > Dear Colleagues, > connected to the wallcovering just described, I wonder if any of you might > know literature about ageing of jute. > The textile concerned has a very peculiar "problem". With the exception of > one covered area it has turned reddish. At first glance, I interpreted this > as ageing. But as the color is exactly even over all surfaces, disregarding > if the textile is in a very dark corridor or next to a brightly lit huge > window. Therefore I think, that the color has nothing to do with light. > One hypothesys we are following (with analysis for dyes and pigments) is, > that the textile was already "new fashion" and was considered too light for > the (slightly retarded) Swiss taste. Maybe the walls have therefore be > painted / stained with a red color. > I would like to balance the dye / pigment analysis with detailed knowledge > about aging and changes in jute. Unfortunately I cannot find anything > really substantial. Is there some kind of "dark aging" for jute which would > lead to a red (and definitely not a yellow/brown) tint? > The corridors are not heated, the house is heated moderately. Therefore it > would not be extremely dry in winter, not does it seem to be very humid in > summer: there are no signs of elevated humidity. The stainig visible on > some of the images stem from fire-fighting water in 1990. > I also exclude the heat durin this fire (roof), because of the extremely > even tint. There are no signs of different thermal areas as would be seen > in case of a fire damage. And it is not soot. > > I am curious, if any of you know more about jute. > > Sincerely, > Karin > > > > > > über 20 Jahre Atelier für Textilkonservierung – 15 Jahre Ideen für Museen > ------------------------------ > *Prev art *GmbH - Atelier für Textilkonservierung > Dipl. Textilkonservatorin-Restauratorin FH / SKR Karin von Lerber > CH - 8405 Winterthur // Oberseenerstrasse 93 // Tel. + 41 (0)52 233 12 54 > e-mail [log in to unmask] <javascript:_e({}, 'cvml', > [log in to unmask]);> // www.prevart.ch > >