Viking Tar

From Smithsonian.com:

Was the Vikings’ Secret to Success Industrial-Scale Tar Production?

Evidence suggests that the ability to mass-produce tar bolstered their trade repertoire and allowed them to waterproof and seal their iconic longships

The Vikings are often viewed as brutish, destructive village-pillagers, but their knack for innovation is perhaps overlooked. Viking-age Scandinavia was kind of the Silicon Valley of shipbuilding in the early medieval period. Their iconic longboat designs, advanced navigational skills, and perhaps even legendary sunstones gave them the ability to raid, trade and establish settlements as far away as Russia, Italy and North Africa. A new study adds another bit of technology to the list of things that gave Vikings a leg up on their adversaries: they may have been capable of making industrial scale quantities of tar, according to a new paper published in the journal Antiquity.

Tar was probably essential to the Vikings’ lifestyle since each longship would have required about 130 gallons of tar to coat all of its wooden elements, the study suggests. Tar was also needed to coat the ships’ wool sails, and the boats would need to be regularly re-tarred between voyages as well. Multiply all that to fit the needs of a fleet and we’re talking about a lot of tar here.

However, little was previously hypothesized about how they would have been able to produce the sticky substance en masse. The new study, authored by Andreas Hennius, an archaeologist from Uppsala University in Sweden, proposes a possible outline of how small scale tar production in the early centuries of the first millennium gave rise to potentially industrial use of tar by Vikings.

“I suggest that tar production in eastern Sweden developed from a small-scale household activity in the Roman Iron Age to large-scale production that relocated to the forested outlands during the Vendel/Viking Period,” Hennius writes in the paper. “This change, I propose, resulted from the increasing demand for tar driven by an evolving maritime culture.”

Read the whole thing. It’s interesting how many historians don’t tend to consider technology like this; thank goodness there are people who are willing to.

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