Historic wallpaper dating
These in turn could be printed using new mechanised wooden and metal rollers.
Concurrent developments in colour production also provided possibilities for new and more varied colours, including some 19th century experiments with arsenic green.
Aside from this multi-disciplinary approach, the conservator must also be able to recognise period designs and styles which not only encourage appreciation, but also help identify contemporary materials and manufacturing techniques.
These in turn have a bearing on the choice of conservation treatment.
The conservation of historic wallpapers relies on the skills of the trained paper conservator.