Does it make a difference? By Jeremy & Joe Download a PDF of this write-up here Download the data for this study here Goal: Assess the impact of RDT on espresso extraction Background: For years in coffee forums on the … Continued
Initially posted: 15 Dec 16 Updated: 22 Mar 17 Abstract The goal of this study was to explore the impact of the OCD distribution device on espresso as measured through total dissolved solids (TDS) extraction with a coffee-correlated refractometer (VST LAB … Continued
Initially posted: 01 Jun 16 Abstract This study had two goals: 1) explore the impact of uniform particle size on espresso extraction; 2) explore the impact of particle stratification on espresso extraction. The dependent variables collected were shot time and TDS. … Continued
Posted: 07 Aug 15 Edited: 08 Aug 15 Abstract The goal of this study was to examine the impact of particular tampers on espresso extraction. Our main objective metric was TDS assessed via two refractometers (VST LAB Coffee III and … Continued
Posted: 28 Jul 15 Updated: 30 May 17 Abstract The goal of this study was to examine the impact of tamping pressure on espresso extraction. The main metric used was TDS assessed via two refractometers (VST LAB Coffee III and … Continued
Posted: 02 Jul 15 Updated: 08 Mar 16 Abstract Continuing with series on refractometer comparisons, the goal of this study was to examine the measurements from three refractometers advertised to measure the total dissolved solids (TDS) content of espresso. As … Continued
Abstract This experiment assessed differences in espresso total dissolved solids (TDS) as a factor of burr sharpness. Ten shots were pulled for each condition (sharp burrs, dull burrs) and TDS measured using an Atago PAL-COFFEE refractometer. Results revealed a significant … Continued
Abstract The goal of this study was to examine the effect of sharp versus dull grinder burrs on the ability of water to saturate a puck of espresso grinds. To assess the level of saturation, post-brew water retained in the … Continued