Tag Archive for 'Grinding'

Five pebbles from Dzudzuana Cave, Georgia. Image credit: Longo et al., doi: 10.1371/journal.pone.0321262.

Archaeologists Find Traces of Indigo Dye on 34,000-Year-Old Grinding Tools from Georgia

Sep 2, 2025 by News Staff

Archaeologists from the Ca’ Foscari University of Venice and elsewhere have found traces of indigotin — a blue secondary compound, also known as...

Harper et al. demonstrate that the addition of external water simultaneously suppresses surface charging and clumping of ground coffee and results in notably different flow dynamics in espresso formats, likely yielding markedly different taste profiles and more concentrated extracts. Image credit: Harper et al., doi: 10.1016/j.matt.2023.11.005.

Grinding Coffee with Addition of Water Reduces Static Electricity, Researchers Say

Dec 6, 2023 by News Staff

Coffee grinding produces large quantities of static charge due to both fracturing and rubbing. Charge causes particle aggregation and discharge, a familiar...

The footed grinding slab from the archaeological site of Oc Eo in Vietnam. Scale bar - 10 cm. Image credit: Wang et al., doi: 10.1126/sciadv.adh5517.

Archaeologists Find Grinding Stones with Traces of 2,000-Year-Old Curry in Vietnam

Jul 23, 2023 by News Staff

The global spice trade has played an essential role in world history. However, because of poor preservation conditions, archaeobotanical remains of spices...

Espresso coffee is brewed by first grinding roasted coffee beans into grains. Hot water then forces its way through a bed of coffee grains at high pressure, and the soluble content of the coffee grains dissolves into the water (extraction) to produce espresso.

New Study Explains Why More Finely Ground Coffee Beans Brew Weaker Espresso

May 9, 2023 by Natali Anderson

A recent experiment showed that, contrary to theoretical predictions, beyond a cutoff point, grinding coffee more finely results in lower extraction. One...

This is an artist’s impression of Çatalhöyük. Image credit: Dan Lewandowski.

New Research Sheds Light on Foodways and Plant Processing at Neolithic Çatalhöyük

Jul 19, 2021 by News Staff

Archaeologists have analyzed a rich microbotanical assemblage from Çatalhöyük, a renowned archaeological site in central Anatolia, Turkey, best known...