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Unanswered Questions

107 questions with no upvoted or accepted answers
18 votes
0 answers
2k 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 ...
7 votes
0 answers
149 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
1 answer
94 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
0 answers
102 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
0 answers
190 views

What exactly in coffee causes oxidation and makes it go stale?

I am doing my IB Chemistry HL IA on coffee oxidation, and how varying levels of oxidation (or after an amount of time) affects its pH value. I know that over time it will get more acidic, in which the ...
3 votes
0 answers
100 views

What manual grinders are good

I already have an old rok grinder and I want to upgrade it, but I am not sure what manual grinders are good. The characteristics that I am looking for are mainly: Consistency of grains and general ...
3 votes
0 answers
54 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
0 answers
47 views

Intermittent Bottomless Filter Spray -- Any Suggestions?

I have a Rancilio Silvia and a Breville Conical Burr Grinder. We roast our own beans using a Behmor 1600, and typically do kinda light roasts. Very often, regardless of the bean, roast, packing ...
3 votes
0 answers
1k 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
0 answers
148 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
1 answer
118 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
0 answers
189 views

What is the best way to remove the sieve/filter from the funnel of a moka pot?

I often buy used pots for my little collection and want to give them a thorough cleaning. However, removing the sieve is a PITA with the crimp that is there holding it in. Note that I am not talking ...
2 votes
0 answers
140 views

Why does store bought Starbucks ground coffee prepared at home taste and look different from the real version?

I recently started trying to make my own coffee instead of just buying them in bottles or somewhere else, and I found ground pumpkin spice at Walmart. I decided to try it, but since I don’t really ...
2 votes
0 answers
28 views

What's the difference between type 2 and 2-5 in the COB green bean classification system?

The Oficial Brazilian Classification (COB) for green beans defines that if 4 full defects are found in the 300 g sample, the source is classified as type 2, but the table says that it's also type 2-5 (...
2 votes
0 answers
120 views

Is 270ml of coffee in a 6-cup Bialetti Moka attainable with the correct grind size?

I have just bought a 6-cup Bialetti Moka Express, and the user manual quotes its 300 ml reservoir should result in 270 ml of coffee. However, I have conducted some tests, and unless the grind size is ...

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