In case anybody is wondering, looks like the R2 Extract refractometer is $229 in the US (on their website). Considering the VST refractometer that Hoffman and Hedrick use is $699 (+ $50 for the app), that's a pretty sweet deal.

Your single pour technique has evolved over the years. Maybe it’s time for a new “intro to single pour” video.

Hey Vince, one small (well kinda big) thing. When measuring refractive index, the sample needs to be as close as possible to the temperature of the refractometer. In other words- the sample needs to be room temp. Even half a degree difference can have major effects on the reading.

I use a similar method for a summer iced coffee recipe, with a 1:10 ratio straight over ice. Quick, high extraction, high strength- easy.

Can you see who is stronger? origami vs Hario mugen. One would argue that you can grind finer on origami, but there is less channeling on Mugen. In practice, who would win?

man, ive tried the single pour so many times, watched so many of your videos... and it always just never tastes good.

I keep getting grinds sticking to the filter in a ring at the top when I do your single pour method. Any tips?

After trying a lot of tutorials on pour over coffee u probably have the best tips on youtube for pour over coffee Keep up the good work Appreciate your help ☺️

Hey Vince. I’m new to your channel and have been watching and trying to learn about the single pour method (thank you for the awesome content). I did have a question. Have you ever adapted the recipe for a smaller dose (say 200-250g pour)?

When are you going to make a video on a single pour over technique for dark roast??? Grind size, temp, times???

well 23% is a good % but you also make a 1:14 ratio. would be intersting to see what % you would get with a 1:15 or 1:16

You’re discounting the increased extraction your stirring induces in the drawdown. To prove single-pour alone is getting the job done, you need to do a brew the same way except you don’t stir, as well as a brew using a different common well-regarded V60 technique (also with and without stirring). Without these comparisons nothing has been proven. A more comprehensive test would make a great video if done right, so I do hope we see it soon!

I use the 02 and i have a hard time to get anywhere and seems to drain too quickly eventho grinds are pretty fine - im using abaca filters. I can only speed up the pour but agitation is then off.. How would the technic be with a 02 compared to the 01 - i use 20/300 usually and a 01 seems to keep the water higher up so the sturring at the end is easier compared to the 02.?

You're measuring TSS Total SUSPENDED Solids. Disolved Solids are calcium, magnesium, sodium: minerals that are bonded to the water molecule & can only be removed byRO filtering. The SUSPENDED Solids are the compounds that water EXTRACTS (does not DISOLVE). You're measuring the SUSPENDED Solids. What are Total Suspended Solids (TSS)? Total suspended solids (TSS), harmful in excess and listed as a conventional pollutant in the Clean Water Act, can indicate the quality of any water specimen, from ocean water to wastewater. When water is poured through a pre-weighed filter, the particulate matter that remains after the filter dries is classified as TSS. This type of measurement provides an actual dry weight of suspended solids, so water quality professionals often pair TSS measurement with their standard turbidity measurements to develop site-specific correlations that can help create time-saving efficiencies. What are Total Dissolved Solids (TDS)? Dissolved inorganic solid materials, smaller than 2 microns, refer to any minerals, salts, metals, in the form of molecules, atoms, cations or anions dissolved in water. Total dissolved solids (TDS) comprise inorganic salts (principally calcium, magnesium, potassium, sodium, bicarbonates, chlorides and sulfates) and some small amounts of organic matter that dissolve in water. The TDS concentration is the sum of all filterable substances in water that can be determined gravimetrically. However, in most cases, TDS is primarily comprised of ions. TDS is mainly used in the studies of water quality in the natural bodies of water, including surface and ground sources.

Do you have a link to get a stir stick like you have?

Single pour > Single dump

omg I want one of those!!! Wow. Would you ideally measure the extraction rate at the temperature you prefer to drink the coffee? I noticed my TDS changes significantly from initial cup pour to my ideal drinking temp (52C) to room temp.

What is the grind size for Comandante Grinder? 16? I'm using Comandante C40 MK4.