2026-01-26 – Weekly Barista News : Why 9-bar for espresso?

Last week, our community engaged in vibrant discussions on a wide range of topics. Members shared their insights on espresso brewing techniques, specifically focusing on the significance of 9-bar pressure. There was also a lively exchange about the health benefits of using paper filters to reduce cafestol in coffee. Artistic expression in latte art and the challenges of maintaining flavor in syrups were also prominent themes.


This Week’s Hot Topics

Why espresso settled at 9 bar
This thread dives into the historical and technical reasons behind the standard 9-bar pressure for espresso brewing. It’s a must-read for anyone curious about the science behind their daily shot.
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Paper puck filters to cut cafestol
Explore the potential health benefits of using paper puck filters in your brewing process. The discussion examines how this simple change could impact your coffee’s cholesterol-raising compounds.
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Dialing in milk for sharper tulips
For those passionate about latte art, this thread offers tips on adjusting milk texture to create more defined designs. Perfect for baristas looking to enhance their presentation skills.
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The 18-inch tip jar miracle
A fascinating look at how a simple change in tip jar placement led to a surprising increase in tips. This thread is an interesting read on customer behavior and engagement.
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Origin-led espresso training
Join the discussion on how understanding coffee origins can enhance your espresso training. This conversation is great for those wanting to deepen their knowledge of coffee sourcing.
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Building a precision pouring micro-curriculum
This thread is all about creating a structured approach to mastering precision pouring. It’s ideal for trainers and baristas looking to refine their skills systematically.
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Keeping ginger-pear syrup bright
A practical discussion on maintaining the freshness and vibrancy of ginger-pear syrup, offering tips that are useful for any barista dealing with flavored syrups.
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Testing a yuzu latte for January
Discover the creative process behind developing a seasonal yuzu latte. This thread is perfect for those interested in innovation and flavor experimentation.
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Dialing cold brew for a class
A detailed discussion on how to adjust cold brew recipes for educational purposes. It’s a helpful read for baristas involved in training or workshops.
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Paper vs metal filters for LDL
Join this conversation comparing the effects of paper and metal filters on LDL cholesterol levels in coffee. A must-read for health-conscious coffee enthusiasts.
Read more here


Wishing you a productive week ahead. Keep sharing your knowledge and passion for coffee.

1 Like

‘9 bar’ feels like a starting point, not a rule — , the dogma drives me nuts. If your shots taste edgy at 9, try dropping to 8–8.5 bar and add a paper puck filter (nice side bonus on the cafestol front); I see smoother flow and less channeling on medium roasts. Anyone logged taste vs pressure like in this thread: Olympia Cremina: Lube all seals and gaskets or just some??

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@amelia_rose03 I’ve had good luck with a 6–8 s preinfusion at 2–3 bar, then limiting to 8–8.5 bar while keeping flow near 1.5 ml/s; if you’re using a paper puck screen, go one notch coarser to keep timing sane… Small caveat: lighter roasts often respond better to +1–2°C rather than more pressure. Curious what roast and basket you’re using.

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It’s fascinating how 9-bar is just a guideline! I often tweak based on the beans I’m using. What’s been your go-to brew lately? :hot_beverage:.

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