The project looked into the matter of changes in wood properties which take place in pulpwood felled and prepared in different seasons of the year, and the effects of these changes on the manufacturing of chemical pulp and the usage value of the wood. This project is continuation to the 1999 study entitled ”Varastolaho, esiintyminen ja vaikutukset” (Storage rot: occurrence and its effects). The project was divided into two parts; the first part looked into the changes in woody tissue during storage and the second part examined the effects of these changes on the manufacturing of chemical pulp. The research problem was approached so as to enable the results to be used in branding the method of determining the quality and value of roundwood on arrival at the pulp mill.
This report is a summary of the results of the entire project. Separate reports have been published on both parts of the project: ”Varastoinnin vaikutus kuitupuuhun” (Effect of storage on pulpwood) (Metsätehon raportti 91 B / Metsäteho Report 91 B) and ”Varastolahon kuitupuun jalostusarvo sellun valmistuksessa” (Converting value of pulpwood containing storage rot in the manufacturing of chemical pulp) (UPM-Kymmene Pulp Centerin raportti, tutkimus numero 19321 / UPM-Kymmene Pulp Center Report, research number 19321).