Extraction woes

NewBoyUK

Hi all

I cant get the grind any finer than this - this is from 18g in 40g in 30s.

Harder tamp makes no change and output makes it worse if anything. I guess this is the best I will get from this grind - unless anyone has suggestions?

94c was the temp - I’m trying 96 tommorow to see if there is anything better.

Suggestions anyone? @MWJB - you advised me last year and were spot on the money 😁

dfk41

NewBoyUK Remind us of the bean, grinder and machine please

NewBoyUK

Its a B2C I’m testing - dark roast.

Not a great deal of info I know

MWJB

NewBoyUK You say ‘a bean to cup’ - do you mean a proper bean to cup machine, as opposed to a Sage style, combination semi-auto espresso machine & built grinder?

I recall the guys at Zurich University doing study on espresso extraction, they settled on 1:4 as the basis ratio, because bean to cups are popular in Switzerland and brew up to 1:8.

So, as grinding finer isn’t lifting your EY, go longer on ratio.

Cuprajake

grind coarse go fast lol

crimson89

You haven’t given us any info about your equipment. You say it’s a dark roast and you try to extract at 94 degrees. You probably need to coarsen up the grind quite a bit and drop the temp to something like 88-90 degrees.

NewBoyUK

MWJB yes a proper B2C. Massively configurable - 2nd squeeze/pre infusion/tamp pressure/tamp backoff between tamp and squeeze

NewBoyUK

Pic

This is at 1:4.4 - this was actually the 1st shot i pulled

MWJB

NewBoyUK This is at 1:4.4 - this was actually the 1st shot i pulled

You’re not getting 10% TDS at 1:4.4.

Best to just give the weight from the scales & the TDS from the refractometer (syringe filtered would be most informative).

EDIT: Sorry, I see the target was 10%, but you actually came in around 4%, makes sense.

NewBoyUK

Pic2

MediumRoastSteam

Im sorry I don’t get all the secrecy. Machine make, model? Coffee roaster? Roasting level?

NewBoyUK

MediumRoastSteam

Its a machine not available yet - and the beans are also white label (not been given any data myself)

It’s awkward I know

dfk41

I would tend to go lower temperature wise than higher as darker roasts are more soluble. Anything stopping you buying a lighter roast and trying that out?

NewBoyUK

Best brew yet 👍 😁 soooo smooth - this was also an unknown coffee on the same mystery machine so I know its capable of goodness 😂

dfk41

NewBoyUK You cannot beat a good play! Did you adjust the temp?

NewBoyUK

dfk41 that was on a difffernt bean - slightly lighter roast.

Ill try dropping the temps and see what happens 👍