Post By DesigningByCoffee
Lighter roast extracting too quickly regardless of fine grind
I have a lighter roast that's extracting too quickly even when ground very fine.
Is this a problem with the roast quality, or a general issue with lighter roasts...or nothing to do with the roast itself?
Is this a batch you roasted yourself Nick or a pre-roasted pack from a cafe?
And what is your machine/grinder setup?
It's one I roasted.
I use a Via Venezia with a Sunbeam Cafe Series grinder. I've always had issues with the grinder but it has sentimental value so haven't replaced. Because I mainly drink aeropress these type of problems are not an issue for me. One of my friends is having the same issue though (with only my beans). I don't know exactly what machine he uses but it is fairly new-fangled, it grinds and tamps, then he clicks it in and hey presto coffee. He can control grind and tamp manually though.
It seems the variable is the beans but I'm scratching my head as to what influence they are having (if it is related). I thought lighter beans need finer grind setting as they aren't as brittle, but if they are really fine then I would have thought that meant dark/light would pour the same.
I'm going to his place Thursday so I'll take some of my super fine grind around and see if it makes a difference with his machine.
Sorry this is all a bit rambling!
If the beans are roasted faster & lighter, they will be a fair bit harder, and will need a substantially finer grinder and often a machine with a little more backend grunt in the pump to be able to push through the finer grounds. Often consumer machines & grinders tend to struggle more with these lighter roasts.
It sounds like you may need to adjust your roasting technique a little if you want your beans to better suit espresso usage in your machine…
Via Venezia also has a pressurised portafilter by default (at least it did when I had one) which may cause issues with the bean being used. I was never able to reliably or consistently produce a decent extraction with the default portafilter.
Originally Posted by NickC
Thanks everyone, I'll try slowing down the roast and see if that improves it.