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submitted 7 months ago* (last edited 7 months ago) by [email protected] to c/[email protected]

Spoiler, its RDT

In case people do nto know what RDT is, which they really should if they have been into coffee for a little while as it makes a big difference:

RDT is Ross Droplet Technique, which is very much adding water to beans. Named after David Ross who came up with it back in 2005

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[-] [email protected] 51 points 7 months ago

This post is like 3 levels of coffee interest removed from mainstream. RDT is unknown outside of whatever small circle the listener is part of which does not overlap with other, known definitions of RDT.

This post is almost gatekeeping because of how much jargon and technobabble is required to know for this very specific subject. Hopefully you see the value in helping others enjoy your hobby and make any future explanation more open to new users!

[-] [email protected] 13 points 7 months ago

For folks who make espresso at home, especially if you’ve worked with a manual grinder of any sort, this is extremely well known. In fact when you first get started and start searching for how to deal with the static problem (cause it’s the first major problem you’ll encounter), it’ll be what comes up. So for future scientists.

https://letmegooglethat.com/?q=how+to+remove+static+from+coffee+grinder&l=1

For the first result I get: https://www.javapresse.com/blogs/grinding-coffee/how-to-deal-with-static-in-coffee-grinders-3-tricks-you-can-try-at-home

Which as #1:

  1. Ross Droplet Technique
[-] [email protected] 8 points 7 months ago

How does a static problem affect the taste?

I don't understand how rdt leads to better tasting espresso. Maybe an easier cleanup session, but taste?

[-] Bakkoda 4 points 7 months ago

So espresso is very picky about measurements. 18g of beans into your grinder ideally yields 18g out. Not getting that amount of ground coffee out of the grinder and hence into your portafilter will heavily influence the taste.

[-] [email protected] 5 points 7 months ago* (last edited 7 months ago)

Is there an acceptable margin of error? It's wild to me that static would cause a difference outside of that margin.

Why not measure your grinds versus measuring your beans? Or, if you know how much you lose to static, could you compensate for that in your bean weigh?

These solutions seem easier than RDT.

[-] [email protected] 6 points 7 months ago

if you know how much you lose to static

That's the trouble, it didn't get vaporized or vanish. It's still in the grinder, or sticking to the collection bin. I'm not an expert or anything but I suspect that the residue oxidizing and mixing with the next batch will have more flavor impact than being a little off with your measurement.

[-] [email protected] 1 points 7 months ago

This feels like it would have the biggest effect. Nice thinkin!

[-] Bakkoda 4 points 7 months ago* (last edited 7 months ago)

Honestly, is incredibly easy to spritz them when measuring, throw em in the grinder and be done.

I've never really read much on the actual effects of water on the coffee flavor itself, just the wonderful lack of static. I don't screw with espresso as I'm at my limit for expensive hobbies. I have in the past and a half gram will make a noticable difference in a shot. Enough to ruin it? Completely subjective.

[-] [email protected] 3 points 7 months ago

So the goal is to make your “ideal” shot for the beans you have. Reproducibly. So right off the bat if the ground weight out isn’t equal to the unground weight in (as close and reproducible as possible) then you’ll have to adjust other factors for each shot. Which can quickly become extremely complicated. Especially with static where the amount of loss is going to vary every time.

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[-] Bakkoda 5 points 7 months ago

I do it for every grinder. Minimal retention = less cleaning.

[-] [email protected] 3 points 7 months ago* (last edited 7 months ago)

I do it for every grinder. Minimal retention = less cleaning.

Yep. Those mornings I forget to introduce a bit of water I always kick myself because now I'm fussing with a brush for three times as long to get my manual grinder clean.

[-] [email protected] 2 points 7 months ago

I find RDT to be more important with an electric grinder than a manual hand grinder.

[-] [email protected] 6 points 7 months ago

Wow.

So what happened was that someone asked a question and while I answered the question someone else answered with a completely incorrect answer. My answer was then down voted and the incorrect one (which has since been edited to add in the right answer) upvoted.

So yeah, you are a bit late to the party here.

At not fucking point did I refuse to answer a basic question.

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[-] [email protected] 34 points 7 months ago

Spoiler - it's RDT

How can it be a spoiler if we have no fuckin clue what RDT is? 😂

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[-] [email protected] 17 points 7 months ago* (last edited 7 months ago)

Not gonna lie, I'm starting to hate lemmy for having the most lazy users. You can literally google "coffee rdt" and the first five links explain in detail what OP is talking about. Meanwhile, they're getting shit on for something he still ended up explaining anyways and even their correct explanation that people asked for is downvoted. It seems like nobody even read the article or has an opinion on it, they're just mad that OP didn't spoon feed them.

[-] [email protected] 11 points 7 months ago

brew a nice coffee and ignore haters

[-] [email protected] 5 points 7 months ago

You know what's lazy? Not spelling out an acronym on first use.

[-] [email protected] 3 points 7 months ago

As a espresso person I'm here mostly because the most popular espresso community on Lemmy is pretty dead.

I do really feel like we'd probably be better served if we posted espresso content in a espresso specific community.

[-] [email protected] 2 points 7 months ago

RDT is useful for pour over as well, really helps improve majority of grinders and grind types.

[-] [email protected] 2 points 7 months ago

True but I would believe the general level of enthusiasm for a conversation about RDT would be substantially higher in a modern espresso group vs filter coffee folk.

Also my previous comment is bit of a inner monologue as someone who posted very randomly detailed things on r/espresso back in the day and rather uncertain if/where I would post that stuff on Lemmy.

[-] [email protected] 1 points 7 months ago

If it applies to both I would still post it here as the community is bigger and would still benefit from it. Even for basic stuff as there appears to be far more total beginners than the subreddits in the other place.

[-] [email protected] 1 points 7 months ago

Hi there! Looks like you linked to a Lemmy community using a URL instead of its name, which doesn't work well for people on different instances. Try fixing it like this: [email protected]

[-] [email protected] 9 points 7 months ago

How does wet beans not gum up the mill?

[-] [email protected] 2 points 7 months ago

You add a very very small amount of water. Like one spray from a tiny spray bottle.

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[-] [email protected] 8 points 7 months ago

Not the science we asked for, but the science we need.

[-] [email protected] 1 points 7 months ago

Its like they got sent back in time to 2005

[-] [email protected] 5 points 7 months ago

OK, I'm loading a spray bottle for tomorrow's shot.

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[-] [email protected] 4 points 7 months ago
[-] [email protected] 5 points 7 months ago

My favorite part of that paper is that thanks to them actually measuring particulate size we now have empirical proof adding a small amount of water improves the consistency of your grind:

it is clear that the inclusion of even small quantities of water (as low as 5μLg−1) results in an immediate reduction in electrostatic aggregates of boulders and fines

[-] [email protected] 2 points 7 months ago

Uh... yes, Mr. Science. We've been doing this for nearly 2 decades. But thanks, I guess.

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this post was submitted on 06 Dec 2023
76 points (80.6% liked)

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