A COMPARISON OF TOOLS FOR PRUNING PINUS PINASTER

Dielectric heating by radio-frequency power has been established in various countries as a practical means for the rapid gluing of wood with thermosetting adhesives. The high-frequency drying of wood and wooden products as an economical substitute for conventional drying methods is being investigated extensively.

Especially in South Africa, it seems the appropriate time to consider this process again. This article is the first in a series and reviews the general principles. Further papers will present values of dielectric properties of South African pines and deal with the possibilities of drying wood by this process.