Pine resin used to hermetically seal 2,000-year-old amphora

Published on January 22nd, 2010 | by Admin


Chemical analysis has found that pine resin was used to seal a 2,000-year-old amphora found in Morocco.

“We have studied the substance that was used to seal the container using three different techniques, and we compared it with pine resin from today”, José Vicente Gimeno, one of the authors of the study and a senior professor at the UV, tells SINC.

The results confirm that the small sample analysed, which is 2,000 years old, contains therpenic organic compounds (primaric, isoprimaric and dehydroabietic acids), allowing this to be classified as resin from a tree from the Pinus genus.

The researchers have identified some substances that indicate the age of resins, such as such as 7-oxo-DHA acid, although this kind of compound was not abundant in the sample due to the amphora’s good state of preservation. In addition, Gimeno says that the archaeological resin of the amphora found was hard and blackish with yellow spots, unlike present-day resin, which is more malleable and orangey in colour, similar to the fresh sap of the tree.

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