Unanswered Questions

71 questions with no upvoted or accepted answers
18
votes
0answers
1k views

Research funding for health benefits by coffee trade associations

How much funding is provided by the coffee industry for research on the health benefits of coffee? I came across a statistic that surprised me by its meagerness. According to their website, the ...
6
votes
0answers
97 views

Slow Roasting Coffee Beans

Conventional Coffee bean roasts at around 200-240C at around 11-19mins to ensure Maillard reaction in the beans to create the familiar taste of coffee we all know today. Could we instead roast the ...
6
votes
0answers
135 views

Empirical data on reuse of grounds, by flow and filter

We wanted to know are there quality empirically generated chemical composition tables examining the relationship between filter porosity, flow by volume per time, and grounds of different varieties?
6
votes
1answer
72 views

Does hydration level change the effect of caffeine?

Apologies if this question does not belong here, it may be suit for the chemistry site, but it pertains to the consumption of coffee directly -> so here it is. Does your prior level of hydration ...
4
votes
0answers
32 views

Does anyone know the history of the “washed process?”

Where did the washed process originate and how has it developed and progressed? And what are the different forms and variations it has taken over the years? I have a hunch that it began in Ethiopia ...
4
votes
0answers
88 views

How can I test or repair my Keurig k45 heating component?

My k-cup coffee maker has stopped making coffee. It's a Keurig K45. It will take water, activate the pump, then it will just stay on the step with the red heating light on. I've let it sit for 15 ...
3
votes
0answers
16 views

Weird espresso leak Delonghi Perfecta ESAM5600SL

I got a used Delonghi Perfecta machine. It's the first espresso machine I have had so I still don't know much about them, I got it a week ago and it was working fine until this morning when it started ...
3
votes
0answers
48 views

Requirements for Nel Drip Coffee

I have a question about Nel Drip coffee requirements. Recently I've been checking few blogs and articles about this type of brewing, it mostly leads to these "settings": - Old coffee beans - Coarse ...
3
votes
0answers
429 views

Manual vs Automatic espresso machine

I’m thinking of transferring to manual machine from a semi automatic machine. What are the differences between manual and semi-automatic machines? I'm interested in how difficult they are to use and ...
3
votes
0answers
742 views

Messy grounds inside of DeLonghi ESAM 2600

I've got a DeLonghi bean-to-cup machine (ESAM 2600), which I find decent in overall. But there is one very annoying issue: not all of the grounds make it from the basket into the internal waste bin. ...
3
votes
0answers
111 views

What steam wand to replace my Gaggia Carezza old machine?

I have an old model of Gaggie Carezza that can be found here. The steam wand needs to be replaced. Does anyone know which one is suitable? I have been looking at this Rancilio Silvia steam wand but ...
3
votes
1answer
87 views

Least Expensive Way to Make Decent Espresso-based Milk Drinks?

I want to know the cheapest machines to make decent espresso for my situation. Needs: I need steam for milk drinks I need the proper brewing pressure I need to use fresh ground coffee, no pods ...
2
votes
1answer
16 views

Inconsistent flow rate of espresso with ESE pods

(Just to be clear, I am aware of millions of questions on the internet about consistently bad flow but my question is about a situation where, most of the time, with ESE, it works very well... And ALL ...
2
votes
0answers
24 views

Is it bad to leave the lever in preinfusion mode for a long time?

We have a Rocket Espresso Milano at the office. Recently, I have often found the machine with the lever in the middle position (preinfusion). I guess some people don't turn it all the way down after ...
2
votes
0answers
38 views

What can cause an overly acid espresso brew?

I went into this new specialty coffee shop today, they had a nice place and very informative brochures about the coffee beans they were using that day, happened to be a top quality Brazilian product ...

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