Hi everyone I have never try Perc beans and today thought about buying some to taste, but discovered smth interesting on their website

Looks like in their V60 recipes they always suggest using grind about 400-500 um. It is smth new to me since usually I grind coarser (600-800 um) and have tasted just several beans that were better finer than 600 um. Of course there isn't a surprise that someone can offer finer grind for specific type of beans, but it was interesting to me that looks like Perc always offers us recipes like these

What do you think about it? If you have already tasted Perc beans, did you follow their website recipe? If you use another beans, do you grind your beans usually finer that 550 um or you usually go coarser?

  • Please please be critical here. We are continually looking for ways to do a better job of helping people find the right coffee for them and then to get to the best possible cup of that coffee.

    We do publish grind size in microns (or when our web font fails, .000mm) for two reasons:
    1. We dial in coffees on a Mazzer ZM, which directly adjusts burr gap in microns.
    2. It gives some kind of consistent reference point to gauge just how much finer or coarser we're grinding one coffee than another. If we're normally at 450, but we're recommending 525 for a coffee, that's a bigger swing than 475.

    We are actively working on translating our brew guides to other common grinders. We purchased a Kingrinder K6 and 1Zpresso K-ultra, specifically because those are common in this sub. There will be a page on our site soon for publishing that kind of information. We also have a DiFluid Omni on the way which we'll use to dive a little deeper into the particle size distribution across some grinders.

    So far, the K6 translates this way PERC ~ K6
    425 ~ 83
    450 ~ 85
    475 ~ 87
    500 ~ 90

    So far, the K-ultra translates this way PERC ~ KU
    425 ~ 7.2
    450 ~ 7.4
    475 ~ 7.5
    500 ~ 7.8

    For those on our email newsletter, spoilers: we're sending out a survey on Friday asking what grinders and brewers our customers are using. The last time we did this, we bought a Breville Barista Express and started dialing in every coffee with it. If there are equally popular grinders, we'll do something similar.

    Of course, you should trust what you're tasting and adjust your brews accordingly. Our goal is to help you nail the very first brew of a new coffee. So please, if you've got suggestions on how we can do that better, please share!

    I applaud your engagement with the group. Add a ZP6 to the lineup please.

    Thanks! I suspect the ZP6 and some Ode variant will be on our shopping list (along with the K7).

    ZP6 and Ode 2 would be great as references. Those are two of the most popular grinders on here… (i own both)

    Another vote for ZP6, and any version of 98mm for nerds would be nice :-) 

    Obviously we need a Lagom 01, just in case someone wants to train for brewer's cup.

    Ya I was shocked the Ode wasn’t mentioned haha.

    Timemore Sculptor 078 Turbo, please and thank you!

    I second this suggestion..

    Ahhh shheeeiit looks like my K6 is getting a K7 brother

    Would the micron range be similar for a philos and z1?

    What do ya know, the ZP6 goes on sale tomorrow. We’ll go ahead and order it then.

    I want to say that I love your coffee. And I love how you are a presence on this subreddit and offer truly useful information.

    Very much appreciated! This place is great. Back in the day when PERC was a 1-person operation and I'd just had my first cup of "whoa!" coffee, Philip would take the time to nerd out with me for like an hour every week and loan me a brewer to play with, and we'd talk all about it. From the very first days of PERC, making time to just share coffee experiences with people and take steps with them along their coffee journey has always been the thing we're most excited about.

    I’ve been on bottomless with that auto reordering scale for the last few years. I came across juggernaut which is a really great espresso on my GS3 and Philos. Then I found out about the 13th….and that probably put the nail in the coffin for bottomless. I recently got a new moccamaster and just got into perc up and what a fantastic coffee!! I kinda stopped ordering other coffees at least for the time being. And the holiday blend is pretty good too!

    This is such a great idea! I wish more roasters did this type of thing!

    I wonder how Mazzer ZM compares to Philos? The grind size you recommended in microns, I've used on my Philos, but I had to go slightly coarser. But it was within the general range of 85-120 clicks, which is 6 microns per click. It's a great guideline no matter what. So Thank you for the effort.

    I'd love to know! I have a few ideas about how we might tackle some less-common grinders and burrs once we get some new tools in house.

    I really miss y'all's old recommendations. Like mentioning whether to go coarser or finer for certain notes, or water temp and ratio suggestions. The new recommendations just set one example with little information about what you're getting out of it.

    I think the general recommendations were much more helpful in figuring out what's possible versus a simple recipe that barely changes across different beans with no notes or dialogue at all.

    It's honestly been more helpful to look on reddit for brewing recs, even when it's as simple as "yeah I went coarser and with a cooler temp, worked well"

    You can blame me (Alan) for that change. The idea was to use one immersion brewer, one pour over brewer, and one espresso machine as representative examples of how the coffees brew in each type of brewer.

    Do you reference the website or email brew tips? If the website, has the more recent addition of "slightly coarser" or "much finer" in the V60 and espresso grind size block been as useful as the prior graphics corresponding to the same?

    I usually use the emails when I order through my account (gf orders sometimes), but on the website I can't find the "slightly coarser" or "much finer" blocks. It could be that the particular coffees I'm looking at are missing the info or that I'm just not on the latest rendition of the site, but the Ethiopian Chel and Colombia Young P. do not have that info.

    Just saw the water temp addition, so that's def on me lol. The initial idea is pretty good though, it definitely consolidates the recommendations that were previously used.

    Good catch! We'll go back through and add to the more enduring coffees that are missing them! Thanks!

    Can you also add timemore c3/s/esp and c5 series to the list? Yes most enthusiasts prefer a little bit more expensive grinders however timemore is still good enough for most! Thanks a lot for this!

    I came in just to find out how people measure these microns. I was hoping to discover zoolander calipers for ants

    Yeah wow, I continue to be super impressed and appreciate your engagement with the community. You guys are easily my favorite roaster for many reasons.

    I typically use an Ode 2 for pour over, currently using a j max for espresso. But would love to see ode 2 grind recommendations. Just wanted to throw in my two cents.

    VERY excited to see what's on the pipeline. Currently enjoying juggernaut as my daily driver (Ode 2 at a 5) and the Gesha (Ode at a 5.2). Its been fantastic.

    Merry Christmas!

    Really appreciate the official insight! Just wanna add that K6 might be a tricky one because K6 cannot be zeroed and they do come in various calibrations. For example, the true zero of my K6 (burr lock, no further turn possible) is around -10. Do you mind sharing the true zero of the K6 at your side?

    Oh, great insight! Alyssa has it to do more testing with it now. I'll ask her and respond here.

    Our K6 burrs touch at -4

    Thanks for that, and all the engagement! Found you guys on here and you’ve been big in the rotation since!

    If I may suggest for formatting on the K6 reference when it goes up either putting it out with the numbers having already had 4 added to normalize to zero at zero, or just including a note that your particular grinder zeros at -4 so everyone can make their own adjustment for wherever their zero is. The K6 does good work, but accuracy between users is a bit of a struggle!

    Enjoying the Diego Bermudez Castillo M-03 now!

    Yes - we’re going to have to figure out a good way to present that caveat for the K6 (and others I’m sure). Thanks!

    So were these measurements taken at burr touch or "0" on the grinder? It's only four clicks but I'm curious. lol

    No, those are not adjusted. The numbers here are the numbers indicated on our grinder’s adjustment ring (plus 60. Why 60? 🤷‍♂️).

    Thanks for the info. I don't know, every brand has their sophisticated secret number system!

    Burr lock might be beyond zero. You should stop clicking when the arm doesn’t fall by itself.

    That's just to test. I only did it once and I wouldn't normally move it into that position.

    That’s actually SUPER helpful to hear your conversions from one grinder to another. I grind with a K6, and knowing that you recommend a bit coarser or finer for a particular brew is helpful. Thanks!

    Thank you for doing this! Love that you're so engaged with the community, you definitely have a loyal customer ❤️

    edit - I use a Timemore C3. Would love a good reference, I usually adjust my grind size by the seat of my pants 😅

    perc with the math

    Love this detailed response. Thank you for your explanation and reasoning. Had no idea how the K6 correlated with microns 🙏🏽

    Great, great response and awesome customer service!!!

    Perfect timing for this post. About to open a bag and was going to have to translate my k ultra grind setting to microns. Really appreciate you doing this.

    Please share how those settings work out for you!

    Those K - Ultra settings seem very course. I’m always around a 6 when using a V60 and doing a 20 gram dose. With the Switch I’m at an 8 using a hybrid method.

    Love you guys! Great bean and awesome designs! Just got my shirt in the mail.

    Hmm. I wonder how closely different KU units are calibrated.

    Looking back through my notes, I did try the KU finer, but tended to get a less even extraction. In that 7.4 range, I tended to get brew times and extractions very close to our dial-ins and solid cups. I will add these dial-ins for the KU and the baseline with our ZM use third wave water. If you're using softer water than that, you may need to go finer.

    If you have the chance to brew with these settings, I'd love to hear how it goes for you!

    I dilute my TWW by half. What filters are you using? I’ve been using the Cafec Abaca filters and get a total brew time between 2:30 and 3 minutes. When Hario changed the V60 filters I was getting very long brew times.

    I’m afraid that if I grind at a 7.4 it’ll brew far too fast.

    My KU is calibrated to burr lock at 0.

    We are using the current version of Hario filters.

    As someone just starting out this is really useful and such a great response. I’m still on my first bag of beans with a Timemore S3 grinder and an awful lot to learn, but I’m enjoying my coffee.

    Oh awesome! We actually bought one of those as well. I brewed with it less and feel much less confident in the dial-ins with the S3. I tended to stay within a very small range with that grinder with what we'd call a 450 grind translating to 4.9 on the S3 and what we'd call a 500 translating to 5.0.

    Again, that's based on pretty limited usage. Alyssa will do a much better job of really dialing it in!

    I consume a bunch of PERC beans. My default is 85 on the k6, glad that matches up! It’s around an 18 on the lagom mini.

    I go a lot coarser on the ode 2, usually around a 7.

    I've been really shocked by the cups the K6 produces. It tends to pull out certain types of acidity in a really unique way (that I very much enjoy). I'm curious, how do the cups from the lagom mini compare to the cups from the K6?

    Thank you for sharing! I find it really useful to know that you use 450 as a starting point. So understandable where I should go coarser and where I should go finer :)

    It's a good navigation

    Also I think that because of your comment it's my most visible post for now, hahaha

    Thank you for asking the question!! Coffee presents such a unique challenge in that, unlike with a bottle of wine, the end-consumer plays a big part in what the final product tastes like. Short of showing up in someone's kitchen in the morning and brewing and tasting with them, it's really really hard to guide people to the cup they want (and deserve!) without wasting valuable coffee. Every time someone critiques our attempts to do so helps us get a little bit better at it. I sincerely appreciate it.

    Love this! I had a similar experience to OP with my grinds, even when translating microns thanks to honest coffee

    I like the idea of using multiple grinders to help home brewers. It could be more approachable if you also included an affordable, general-market option like the OXO Brew Conical Burr Coffee Grinder.

    Yes, absolutely. We've had and sold and advocated for versions of the Baratza Encore for well over a decade now, and I've always wanted to publish brew tips for it. The struggle is how inconsistently they're calibrated from one unit to the next. If something like the OXO pops up repeatedly in our grinder survey, we'll look to add that!

    Appreciate the grinder conversions. I never go that fine in my k ultra. The few times I did I definitely had a slow over extracted brew. I'm just so curious how yall make it work on your end. Even w low agitation pour structure and lower temps

    You never grind finer than a 7?!

    Not for pour over. Then my TBT would be four plus minutes

    We must be using different filters. With the Cafec Abaca filters I use a 6. If you’re using Hario branded filters you’d have to go courser. They changed the paper a year or so ago. I forget about that.

    I use abaca cone and origami flat

    You guys are the best

    How do you translate the grind sizes to clicks on K6? I thought that K6 adjusts around 16 microns per click, wouldn’t that mean the grind size would be around 1200 microns at 83 clicks?

    I brewed a whole lot of coffee and took a whole lot of notes! These are just the settings where the cup I got from brewing with the K6 most closely matched what we got from dialing-in the coffee on the ZM.

    We will take some particle size distribution readings soon and see how close the grind sizes actually are!

  • Perc sends out an email with brew tips. I find one helpful part is the general statement about grind size, such as “This coffee needs a much finer grind than most” (in the case of the recent Nicaragua Maximino) or “The Ecuador Pepe Jijon needs an exceptionally coarse grind.”

    We all have different grinders, and I don’t think we can reliably translate the particle size from one grinder to another. But telling me to go coarser or finer is a helpful and easy way to get me started.

    I agree, it helps maybe more that particular sizes, didn't know that they send it

    Hm, maybe you need to be signed up to receive emails from them? If there is a specific coffee you’re interested in, I can check if I have the email for it

  • In short, I would suggest simply follow your usual recipe and adjust from there on.

    My view might be too radical but I personally find the so-called microns to be a bogus concept. It is well known that grinders don't output uniform particles of the same diameter. Rather, grinders generate different distributions of grounds. So what do those microns mean? Is it average, median, distribution peak or something else (like in the cupping protocol where 70% to 75% of the particles passing through a certain sieve)? I don't find a clear answer here. Now I am wondering if the microns people refer to are the same thing. If not, it might explain why some instructions from those recipes appear confusing.

    Sorry for the rant but I hope to see if people have better insight about those micron values roasters offer.

    Edit: corrections of typos

    I thought it was micron gap from burr chirp. But I’m generally uninformed.

    ETA: not saying this makes it a useful metric, just that that’s what I understood it to be.

    Onyx has a grind calculator with several grinders that tells you what setting to hit for the micron size. I think that it’s actually helpful to share your starting point or recipe and it’s rather obvious that different grinders produce different qualities of grind.

    Yeah. Providing a calculator or reference alongside can potentially help make it much more helpful even if one doesn't directly answer what the particular micron he or she is referring to. Meanwhile, one of the complaint people have is that those converters are not always accurate. I remember seeing more than one complaints here about the Onyx converter on certain grinders, so are other similar converters.

    So people actually are measuring the grind size on their own using the Onyx calculator? On some grinders the burrs are aligned differently but that’s a level of obsession beyond me. I use the suggestions as a good start and tweak from there.

  • Have you tried their recipes? They’ve been transparent about preferring sweet, body filled cups and I have had success with their recipes. If you prefer different, their coffee is also tasty with coarser recipes. This is why some companies (Prodigal, Sey) don’t release recipes. Everyone prefers coffee different, and that’s enhanced with us coffee nerds. Think of the recipe as a starting point, or if you know you want something different, start with your normal specs.

  • I think giving grind size in um is quite silly because you can never tell whether they meant particle size or grinder burr gap

    Even if you know the burr gap size that they use that doesn't correlate directly to the particle sizes and the particle size distribution, and different beans will also produce very different results with the same grind setting.

    Different grinders can have wildly different particle size distributions resulting in more boulders and fines which affects the drawdown and final cup.

    If you want to try use their recipe just focus on the temperature and ratio they provide, grind with your normal grind size and try to match their total brew time/drawdown time.

    Even if you get the exact same drawdown time it won't necessarily mean the best cup for you, so I'd suggest just sticking to your normal brewing method and adjusting that until you have a cup you enjoy.

    I always assumed this is the particle size

    Particle size is a silly one to give because how are we supposed to measure it? Also no grinder is so uniform that every single particle is the same size, it's usually distributed over a range of sizes

    I'm sure Perc provides some kind of reference somewhere and are probably referring to the burr gap used in the particular grinder they are referring to, which is also not very helpful unless you have the same grinder.

    Even if you had the same grinder, you cannot use one size burr gap or particle size for every single bean, even two bags of the same coffee from different batches will have variation so doing the manual work to dial in each bean is absolutely necessary if you want good results according to your taste preferences.

    Same, I also always thought that we are talking about particle size and didn't even thought about other options. But now I'm not even sure what am I talking about when I'm talking about microns

    So, for example, I always have used Honest coffee guide to understand the size of my grind. What do you (or others if you read this) think, are they talking about particle size in their tables?

    Yea I use that guide as a general starting point for when someone’s recipe says a specific size. I found personally I tend to prefer smaller grind size on my P2 for most recipes than that guide says. I have no idea if it’s just taste or the chart is ‘wrong’ but regardless it’s still useful for general idea.

    That's a great resource, and for many grinders can get you to a good starting place. If you take a look at the Mazzer ZM (which is what we use to dial-in and for service on bar), you'll notice the numbers at the top and the bottom of the chart are the same.

    When your grinder has RPM control, what setting do you use? I just got an 078 and have no idea where to set it. For now just have it at 1000

    Great question. The effect isn’t exactly the same as grind size changes, but similar. A slower moving burr will generally produce fewer fines and lead to a faster flow rate and vise versa. For a pour over, try going with a lower rpm, just not so low that you stall the grinder. If you’re making espresso, you’ll find the higher rpm will keep shots more controlled. I’m not positive exactly the rpm for each numerical setting on my personal grinder, but I would SWAG burr speed around 500rpm for pour over and 1000rpm for espresso.

    Edit: the so-what is the fewer fines and faster flowing pour over means you can grind finer because contact time is shorter. A finer grind is generally going to extract more evenly. There’s a lot more going on, but that’s the basic idea.

    I think they have done alot of testing to measure the actual particle size distribution for each grinder at every setting, and then taking the average of that and using it to create the graphs

    They are somewhat useful as a starting ballpark reference when using a new grinder or new brew method but whenever I've tried to actually use it with recipes like this I've had suboptimal results, usually leading to grinding finer that what is required.

  • I personally have my own recipe at this point, but I think super high extractions and tds north of 1.40 is almost never an enjoyable cup. It’s always heavy, drying, bitter, or brown. I think light roasts are much tastier at 17-20%, 1.2-1.35 tds.

  • I do 5 pour, v60, 95 c, 6.5 on kultra for perc beans.

    Sometimes I’ll go a bit coarser for really funky beans, but I try to target even extraction for perc since their coffees have a ton of flavor. If I grind really coarse I get an unpleasant mix of extractions due to fines.