Permali is a commercially available hardened wood with impressive properties, but it's based on impregnation with a resin which is not the most environmentally

Permali is a commercially available hardened wood with impressive properties, but it's based on impregnation with a resin which is not the most environmentally friendly process. A particularly interesting application of Permali is the nuts and bolts fastening the ATLAS-I Trestle (said to be the largest wooden structure in the world) together, since the nature of the facility required use of a dialectric material for the large fasteners. The resin process has definite downsides though... I'm curious about the chemical process involved in this proposal. Historically, chemical treatment of wood has been a significant source of environmental contamination. Although modern precautions reduce this problem, it'd be a big step forward if the chemicals involved here are pretty safe.