A paper copy of Setbacks, Vol. 3., No. 1., 1990. Oddly, this paper volume is easily accessible in my library, while the more recent, online digital only version is difficult, if not impossible to find. All three early volumes are indispensable.
I originally published the article linked to below in “Recent Setbacks in Conservation Online” in 2004. In the intervening years, many of the problems discussed are, regrettably, as yet unresolved. Sadly, Setbacks Online seems inactive and inaccessible. Please be aware that the conservation techniques mentioned in this article are possibly somewhat dated, and are presented for historical and informational purposes only, and the author takes no responsibility for their efficacy or lack thereof. Caveat Conservator!