New restoration methodolgy to retrieve lost flexibility to brittle tracing papers

Approach to a new methodolgy to retrieve the lost flexibility to brittle papers.
Tracing papers -so usual among technical drawings- have in common their transparency, but there are significant differences in the process to make them. The properties and behavior will be very different then. Impregnated papers, for an instance, were applied oils or varnishes to provide them translucency.
Explanation restoration of several drawings in which the varnish was removed to replace it later. Continue reading