Studies on Pitch Troubles, its Cause and its Measure to be taken for its Prevention (IX)

On the Qualitative Change, and the Quantitative Change due to Elusion produced on Sulphite Cooking in the Resin from the Oleoresin of the Akamatsu(Pinus densiflora) and its Sap- and Heartwood, and on

Abstract

The chemical effect produced by sulphite cooking and washing in the resin component of the oleoresin of the akamatsu and of its sap-and heartwood was assessed by examining the composition of the pitch from the wood so treated : oleoresin from the akamatsu and the resin extracted from the sapand heartwood of a 30-70-year-old akamatsu were cooked in sulfurous acid to be compared in their composition with what each before it was cooked.