Tuesday, January 25, 2011

The Demerits of Frozen Beans

This was too great a video not to repost! The original is over at the Seattle Coffee Gear blog.

It's surprisingly hard to craft entertaining content that answers basic consumer questions in a creative, non-threatening way. Great job, Seattle Coffee Gear!



Monday, January 17, 2011

The Problem of Water: Looking for the Ghost in the Machine

On Saturday evening, I set out on an elusive chase to identify potential taste contamination stemming from my brewing equipment. I taste-tested my pour over brewing kit with boiled, Brita-filtered water.  


The results were surprising.


I tested twice: once on a well-used K250 V60 filter and once on a new filter. In each case, I used a Hario Buono pouring kettle, a Copco Fusion boiling kettle and a glass V60.  Drinking containers were glass or ceramic. Each pour wetted the entire filter in a circular motion.

Tasters: myself (Nate), my lovely wife and Katherine Hartline of Trabant / Mercanta


Each test used three separate cups:

1. First pour through a dry, room temp filter. Approx. 12 oz.
2. Second pour immediately after first through the same filter. Approx. 8-12 oz
3. Third pour straight into a drinking container as a control. My Hario tended to run out of water about this point, so after about 4 oz of Hario water I topped up from the Copco.

In each case, we observed the surface of the water for visible oils and tasted the three cups (not blind). 


For the used filter, the first pour revealed substantial floating oils, a slight coffee taste and a metallic taste. Pour two yielded very little oil, no coffee taste, and a hint of metal. The slight acridity of the metal seemed to balance the sweetness of the Brita. Pour three revealed a distinct metallic taste, somewhere between the first two pours. All three of us preferred the second cup.


For the new filter, results were similar, without the complicating factor of the coffee. Again, we preferred cup two.  


What does this mean? Instinctively, I'd suggest it means that a pre-rinse immediately before brewing and minimal dwell time in the kettle are both key factors for minimizing hints of metallic contamination in the brew. While I'd kept brew time minimal before the experiment, I had also been failing to pre-rinse, so these results suggested a change in routine. Since the experiment, I've incorporated a pre-rinse into a couple of brews and found no discernible metal taste.


Of course, these results aren't bullet-proof.  For one thing, using Brita water simplified the problem by taking the vexing variable of dissolved solids out of the equation. We also didn't get into the effect of cleaning methods / products or the hairy question of taster's bias, which is a particularly pesky ghost in the machine. 


Despite uncovering some new questions, we were able to uncover some reasonably definitive results that changed the way we brew.  Here's to incremental improvement!



Friday, December 24, 2010

Micro Lots and The Perils of Buying Local

An article from the Economist has got me thinking about the price we pay for coffee and other produce.  I've read much spilled ink on the subject of sustainable coffee, but reading the Economist's report on the sorrows of undocumented farm workers provoked some new thinking on coffee and food in general.

1.  Indie coffee businesses have fallen in love with the micro lot.  Myself included, we are proud of knowing what hillside our coffee comes from, and the name of the farmer who cultivated it.  The problem is that most coffee farmers, even many of those attempting to grow specialty coffee, never get the chance to produce a micro lot.  Instead, they must work with large companies or sell to traders on the C market.  

Although micro lot coffee remains a tiny percentage of the overall coffee market, I see opportunities for disproportionate impact amongst the world's coffee farmers.  With an up-market piece of the pie, I'm hopeful that we will leverage our passion for better coffee to try new and innovative sustainability solutions that larger companies can learn from.  

What if we expanded our coffee quest to previously commoditized producing regions? What if we tried, documented and reported on our experiences so that others could learn from us?  What new ideas and new best practices are already out there that we can learn about and try in a new place?  Daniel Humphrey's work with the USDA on field quality in Puerto Rico and the Global Coffee Quality Research Institute's study of cup quality in Rwanda are both outstanding examples of what we could contribute to coffee farmers everywhere.

2. We've done a good job educating consumers on the importance of green and fair growing practices at origin.  The story of the Vegas family in the Economist, however, reminds me that the food industry as a whole has brushed the social costs of cheap food under the rug.  Why can't the "fair" branding successfully applied to coffee over the last two decades be applied to other food products too?  

Although we're starting to see progress with chocolate, organics, and locally-grown produce, there's a long way to go.  Organic or not, most produce in America is still harvested by undocumented migrants who work hard for wages that are higher than they could earn elsewhere, but lower than most of us would take.  Meanwhile, most tropically-grown commodities remain just that, commodities whose cultivation is often rife with the worst sort of labor abuses.

Recognizing the true costs of the current system doesn't make solutions apparent.  Forcibly returning millions of undocumented workers, if it could be done, would simply push millions of families back to lives of even less opportunity in their home countries.  And it's far from clear if consumers would respond to a more aggressive fair-trade strategy aimed at raising prices on everything from bananas to sugar.

I've touted buying local as a constructive and prophetic alternative to the status quo.  But even local isn't guilt-free by itself.  If everyone in the country bought from the farm next door, farmers in places like Oaxaca would be even less able to afford essential health care or education for their children, let alone dreams of a future in a place with more opportunities.  Put another way, purchasing a Washington carrot keeps money out of the hands of farmers in developing countries that depend on that agricultural income from our food system.

None of this means local farms and sustainable growing practices aren't an excellent solution.  I'm more aware of the true costs of my food, though, and I'm wondering if my support for local and sustainable agriculture needs to be supplemented by an outpouring of compassion and creative thinking on behalf of those who would lose their jobs if my dreams become reality.  

We've already seen a good example of constructive work on the challenges that come with improving quality in our own industry as we've committed ourselves to sustaining the farmers whose produce we value.  Although we as an industry wouldn't be directly involved, I can't help but wonder what a similar commitment would look like in bananas, chocolate or spinach.

All in all, a commitment to local food seems to be a more serious thing than I thought, and I'm driven to my knees for those trying their best to thrive within a warped food system.  Uncomfortable thoughts, indeed, but appropriate for Christmas.

Thursday, December 16, 2010

Introducing: The K165 Siphon Filter!

Almost as soon as Alex Negranza posted his Coffee Catcher siphon hack, we were asked when we'd be producing a filter for the 3 cup vac pot.  

The answer is now!


In order to fit a variety of siphon diameters, we decided to develop a filter fitted to the glass throat of the brewing chamber, which is the same size in most siphons.  We asked some vac pot geeks to help us pick an ideal mesh size, and they settled on our K165 mesh because of it allowed oils through easily while still offering a clean cup.  

The K165 is single-layered so coffee flows easily through the filter during draw-down.  The filter is folded tightly and stitched with non-tarnish Argentium silver around the frame.  As a final step, we crimped the edges of the mesh to ensure a perfect seal against the glass lip of the siphon.  It's worth noting this mesh is even finer than our Coffee Catcher mesh, so it offers an even cleaner cup than the Coffee Catcher siphon mod.
It's a clean seal!


One product tester summed up his experience this way: 

"The filters are excellent, the 165 in particular.  We used Ecco's Yirg, which popped even though it's a week post roast.  I liked it at 17 grams, ground to 18 on a Virtuoso, heat off at 0:45, temperature 91-92 C, simple quick stir at beginning and end. ... We loved how crystal clean the 165 was. Oils were gloriously there, but there was also flavor clarity.  A tiny amount of fines would make it through but when pouring we'd just leave them in the bottom globe."

We're excited to let this one out into the wild so all you geeks can start to experiment!  Check it out over at Kaffeologie.  If you're a blogger, drop us a note if you'd like to review one.

Happy brewing!  And thanks to all you folks who kept asking us to develop this.  It was a blast... :)