Archive
DATENO.EXPERIMENTTOPICRESULT
2024-04-0311Assessing the impact of RDT on espresso extractionSpritzing beans before grinding (RDT) had no significant effect on espresso extraction in this experiment, and may have made shot times less consistent.ESPRESSO, GRINDING○ Not supported2016-12-1510Examining the Impact of the OCD (and OCD 2) on Total Dissolved Solids ExtractionThe OCD and OCD 2 distribution tools consistently lowered espresso TDS and extraction yield, and didn't make shots any more consistent.ESPRESSO, TOOLS○ Not supported2016-06-0109Exploring the Impact of Particles on Espresso ExtractionParticle size alone didn't predict espresso extraction, but a wider range of particle sizes increased it. Smaller particles lengthened shots; where they sat in the puck didn't matter.ESPRESSO, GRINDING, TOOLS○ Not supported● Supported2016-02-2408Examining the Impact of Particulate Matter in Refractometry for Coffee AssessmentVST syringe filters remove much, but not all, of the particulate matter that skews refractometer readings. They also remove some dissolved solids and release particles of their own.BREWING, MEASUREMENT, TOOLS● Supported2015-08-0607Comparing the Impact of Tamper on ExtractionOf the four tampers tested, only the La Marzocco changed extraction, giving significantly lower TDS and extraction yield. The other three were statistically the same.ESPRESSO, TOOLS● Supported2015-07-2806The Impact of Tamping Pressure on Espresso ExtractionTamping anywhere from 5 to 20 kg made no difference to espresso TDS or extraction. Brew weight was the only factor that mattered.ESPRESSO○ Not supported2015-07-0205Measuring Total Dissolved Solids: A Refractometer Comparison (Part III — Espresso & Filters)For espresso, the Atago PAL-COFFEE, VST LAB II and VST LAB III measured TDS comparably. The Atago gave the tightest repeat readings.ESPRESSO, MEASUREMENT, TOOLS—2015-05-3004Looking at Burr Sharpness and TDS in EspressoDull burrs produced significantly lower espresso TDS than sharp burrs, which suggests TDS could help flag worn burrs.GRINDING, TOOLS● Supported2015-05-2303Measuring Total Dissolved Solids: A Refractometer Comparison (Part II)The VST LAB III and Atago PAL-COFFEE performed comparably, and both were significantly less variable than the older VST LAB II.BREWING, MEASUREMENT, TOOLS—2015-04-3002Measuring Total Dissolved Solids: A Refractometer ComparisonThe VST LAB Coffee II and Atago PAL-COFFEE read filter-coffee TDS comparably, and zeroing with distilled water versus brew water made no significant difference.BREWING, MEASUREMENT, TOOLS—2015-04-1901Espresso Grinding: The Impact of Burr Sharpness on Post-Brew Water RetentionSharp and dull burrs left the same amount of water in the espresso puck. Burr sharpness made no difference to post-brew water retention.ESPRESSO, GRINDING○ Not supported2015-04-19ESSAYOur Approach—NOTHING MATCHES THOSE FILTERS.
THE INSTAGRAM ARCHIVE WILL BE CATALOGUED HERE ALONGSIDE THE LONG-FORM STUDIES.