Between the 3rd and 5th of May the International Association of Book and Paper Conservators (IADA) hosted their 2017 symposium, ‘From Generation to Generation – Sharing Knowledge, Connecting People,’ at the Oslo Konserthus in Norway, a wonderful modern building in the heart of this capital city.
The conference was aimed at exploring the way knowledge and skills are passed on and shared with younger generations of conservators, looking at various teaching programmes worldwide, social media and academic writing amongst other subjects. The conference also focused on practical work, challenges linked to treatments, and our ability as conservators to reflect as we adapt past techniques and create new practices.
I was delighted to be given the opportunity to present a research poster on the use and adaptation of yasha at the Chester Beatty Library. Yasha is a natural dye obtained from the cones of the alder tree, which was first introduced to me by the two wonderful conservators, Andrew Thompson and Sydney Thomson, at the Restorient Studio, in Leiden in The Netherlands.
In Japanese mounting studios yasha is used to dye the lining papers of both hanging and hand scrolls. The light brown colour obtained from yasha helps to soften the bright white tone of the lining paper and silk so that it is more sympathetic to the delicate tones of historic objects.
Through centuries of practical application, the traditional use of yasha has proven stability and durability which makes it suitable for conservation. Papers dyed with yasha remain pH neutral or slightly alkaline and retain their brightness and colour on ageing.1 Most plant dyes are light sensitive but yasha is lightfast.2 It continues to be used today for these qualities.
Like many features of the traditional Japanese conservation studio, yasha is now readily available to Western conservators. With a growing interest in adapting conservation techniques imported from East Asia and Japan, the use of alder cones has become a known technique for dyeing paper when working on Japanese or Chinese Art objects. However, its use has rarely been developed outside of this small circle.
At the conference, the poster session took place on Thursday for over an hour after lunch, when attendees had the opportunity to ask questions about the research presented. I was delighted with the interest the research sparked and feedback I got from different conservators. Some had used the dye previously but were excited to hear about different application techniques, others were keen to be introduced to it and the ways to adapt its use to best suit our practice.
The conference finished with Friday visits organised at various institutions throughout the city, looking at the wonderful conservation work going on in Oslo!
Overall the two day conference was immensely varied and interesting to conservators of all generations who hopefully have learned from each other. The beautiful tributes to the important role of mentoring, teaching and sharing that Christopher Clarkson and Fred Bearman have played in the short history of conservation felt very appropriate with the overall topic of the conference. They will be sadly missed as pioneers and mentors to many.
After the conference I took the opportunity to travel to Bergen. Norway is a stunning country and I was delighted to see some of the beautiful scenery, including these most amazing fjords along the way!
Julia Poirier, Book and Paper Conservator
1 – Yeh, Brigitte. Munn, Jesse (2003) ‘An Evaluation of Xuan Paper Permanence and Discussion of Historical Chinese Paper Materials’ from ‘Scientific Research on the Pictorial Arts of Asia’. Edited by Paul Jett et al. Proceedings of the Second Forbes Symposium at the Freer Gallery, Washington DC, USA.
2 – Grantham, Sandra; Webber, Pauline, (2002) ‘Mellow yellow: toning papers with traditional Far Eastern colourants’, The Paper Conservator, Vol.26, pp. 49-57.