Showing posts with label good coffee. Show all posts
Showing posts with label good coffee. Show all posts

Monday, March 28, 2011

Coffee Language - How to see through the jargon

Well, at least it's brown?

I have a love-hate relationship with coffee. Sometimes it starts out the perfect morning and sometimes it ruins your day pending on what swill you injest.

Given a good-quality bean, roasting is probably the single most important factor influencing the flavor of coffee. The most significant variable is degree, or darkness, of roast. The longer the coffee is held in the roaster and/or the higher the roasting temperature, the darker the bean. The darker the bean, the more tangy and bittersweet the flavor. That may be for you Portlandians, but I like my coffee a little lighter with more "Zip". I said it, Zip.

Returning to terminology, coffee drinkers are so habitual that entire nations march from coffee initiation to grave knowing only one style of roast. This uniformity accounts for the popular terminology for describing roasts: French roast, usually the darkest; Italian roast, a little less dark; and Viennese or light French, only slightly darker than the traditional American norm.

This assigning of national names to coffee roasts is a bit arbitrary, but has some basis in fact. French roasters, particularly those in parts of Northern France, do roast coffee very darkly, justifying the epithet French for the very darkest roast style. Those damn French. And, very generally, southern Europeans roast their coffee darker than northern Europeans. I will leave the question of whether darkness of roast correlates to the relative intensity of nocturnal habits among the various nations of coffee drinkers to those who may want to consider the issue over their second cup of dark-roast coffee - which never usually involves myself.

However, the "standard" roast against which the French and Italian roasts of America are implicitly measured varies both by region and by roaster. Berkeley-based Peet's Coffee & Tea, which initiated the current American fashion for very dark roasting, brings all of its coffee to an extremely dark degree of roast. Consequently, the "regular" Peet's roast is far darker than many other roasters' French roasts. Traditionally, the American West Coast prefers a darker roast standard than the East Coast, with the Midwest appropriately somewhere between. Some of the darkest roasting in the world goes on in the American Southwest. *Not to be enjoyed with your favorite Tex-Mex.

The success of Starbucks with its darker roast style has, in part, altered this regional pattern. Many newer roasting companies, regardless of region, are now attempting to imitate the original Starbucks dark-roasting style. Unfortunately, many of these newcomers tend to be clumsy in their imitation, resulting in dried-out, burned coffees. Meanwhile, Starbucks itself has pulled back from its original dark-roasting position. And, being Starbucks, has come up with its own copyrighted terms for various degrees of roast as they interact with the coffees being roasted.

The Specialty Coffee Association of America (SCAA) has gone in the opposite naming direction from the fanciful route taken by the Starbucks' publicists. The SCAA has promulgated a straightforward, no-nonsense set of terminology for roast and related that terminology to objective, instrument-determined criteria for degree of roast. The SCAA terminology, which is as practical as a Volvo station wagon (and about as exciting), runs from Light Brown for the lightest roast, through Medium Brown for the middle of the range, to Very Dark Brown for the darkest, with various intermediate stages defined by inspiring terms like Light-Medium Brown and Moderately Dark Brown. Despite its blunt simplicity, the SCAA system probably gives the specialty coffee buyer the clearest available set of guidelines for describing roast.

The only way to really understand roast is to associate flavor with the color and appearance of the bean rather than with name alone. Don't worry about the names and taste for yourself what tastes best according to your liking.

Tuesday, March 22, 2011

Little Johnny to mom - What's a TDS meter?

Nerd approved post

Let's get our Science groove on shall we?

Total Dissolved Solids (TDS) are the total amount of mobile charged ions, including minerals, salts or metals dissolved in a given volume of water, expressed in units of mg per unit volume of water (mg/L), also referred to as parts per million (ppm). TDS is directly related to the purity and quality of water and water purification systems and affects everything that consumes, lives in, or uses water, whether organic or inorganic.


During the brewing of coffee and espresso, solids are extracted from the coffee grounds and can therefore be measured with a TDS meter. Depending on Brew Temperature, Extraction Time, Grind Coarseness, Amount of Coffee etc., the TDS value measured will vary. The monitoring of the TDS value will ensure consistent product quality with your coffee and any beverage conducting tests.

Got some questions and Answers about TDS in water you say?

What Are Total Dissolved Solids?

1. "Dissolved solids" refer to any minerals, salts, metals, cations or anions dissolved in water. This includes anything present in water other than the pure water (H20) molecule and suspended solids. (Suspended solids are any particles/substances that are neither dissolved nor settled in the water, such as wood pulp.)

2. In general, the total dissolved solids concentration is the sum of the cations (positively charged) and anions (negatively charged) ions in the water. Did you write that one down?

3. Parts per Million (ppm) is the weight-to-weight ratio of any ion to water. Say huh?

4. TDS is based on the electrical conductivity (EC) of water. Pure H20 has virtually zero conductivity. Conductivity is usually about 100 times the total cations or anions expressed as equivalents. TDS is calculated by converting the EC by a factor of 0.5 to 1.0 times the EC, depending upon the levels. Typically, the higher the level of EC, the higher the conversion factor to determine the TDS. When's lunch?


Where do Dissolved Solids come from?

1. Some dissolved solids come from organic sources such as leaves, silt, plankton, and industrial waste and sewage. Other sources come from runoff from urban areas, road salts used on street during the winter, and fertilizers and pesticides used on lawns and farms.

2. Dissolved solids also come from inorganic materials such as rocks and air that may contain calcium bicarbonate, nitrogen, iron phosphorous, sulfur, and other minerals. Many of these materials form salts, which are compounds that contain both a metal and a nonmetal. Salts usually dissolve in water forming ions. Ions are particles that have a positive or negative charge.

3. Water may also pick up metals such as lead or copper as they travel through pipes used to distribute water to consumers.

4. Note that the efficacy of water purifications systems in removing total dissolved solids will be reduced over time, so it is highly recommended to monitor the quality of a filter or membrane and replace them when required.


Why Should You Measure the TDS level in your Water?

The EPA Secondary Regulations advise a maximum contamination level(MCL) of 500mg/liter (500 parts per million (ppm)) for TDS. Numerous water supplies exceed this level. When TDS levels exceed 1000mg/L it is generally considered unfit for human consumption. A high level of TDS is an indicator of potential concerns, and warrants further investigation. Most often, high levels of TDS are caused by the presence of potassium, chlorides and sodium. These ions have little or no short-term effects, but toxic ions (lead arsenic, cadmium, nitrate and others) may also be dissolved in the water. I have no idea what you just said?

Even the best water purification systems on the market require monitoring for TDS to ensure the filters and/or membranes are effectively removing unwanted particles and bacteria from your water.


The following are reasons why it is helpful to constantly test for TDS:

1. Taste/Health High TDS results in undesirable taste which could be salty, bitter, or metallic. It could also indicate the presence of toxic minerals. The EPA's rescommended maximum of TDS in water is 500mg/L (500ppm).

2. Filter performance Test your water to make sure the reverse osmosis or other type of water filter or water purification system has a high rejection rate and know when to change your filter (or membrane) cartridges.

3. Hardness High TDS indicates Hard water, which causes scale buildup in pipes and valves, inhibiting performance.

There you have it, a little science lesson for you and yours. Thank me later.

Thursday, March 10, 2011

We like coffee and drink it at an inappropriate amount

I pretty much bow down to the coffee gods, daily. The best thing about a morning is usually a great cup of coffee or to look out your window and not see another 12" of snow. (Lucky us up here in NY State)










The Rancilio Silvia is one the best single boiler machines in production. (I am biased, I was given one and freaking love it!) Like more commercial brand machines, it's all in the brass facts. Brass boiler, brass lines and chromed brass brewing head all help to maintain temperature and heat distribution for the perfect espresso.  

It is basically Kick-(br)ass!

The Silvia will deliver consistently fine espresso, lattes, cappuccinos and more, just with the touch of a button. It's beautiful to behold and simple to use. You'll be making your favorite espresso to the raves of family and friends. This is a quality machine that compares to any home model, period!

Features.......

The Silvia requires no special plumbing or electrical outlets. Just plug it in and it's ready to operate. With purchase, the Silvia comes with two filter baskets, one for single shot and the other for a double shot, coffee tamper, measuring spoon and an instruction manual. 

Simple to Use Controls

Push the large central power button and an orange light comes on and stays on until the Silvia is at operating temperature for espresso, steam or hot water. Three more professional grade rocker switches now let you chose which one of those options you want. Top is for espresso, the middle for hot water and the bottom one is for steam.

Flip the espresso button and that rich, hot liquid will start to flow. Switch it off when you have the amount you want. For hot water, simply flip the middle switch; open the steam valve knob and hot water gushes from the steam wand. For lattes and cappuccinos, flip the bottom steam button. When the orange light goes off, open the steam valve and start frothing milk.

Milk Frothing and Hot Water

The Rancilio Silvia features a straightforward chrome plated steam wand that delivers plenty of ready steam for milk foam. In 1.5 minutes the Silvia will have enough milk to make the average sized latte up to temperature. Simply put, the Silvia out performs almost every espresso machine under $500 in the steaming and frothing race! The steam wand also doubles as the outlet for hot water. Simply press the hot water button and hot water will be dispensed for making beverages such as the popular Americano or tea.

Quality Brewing Group

The group head (or the component that accepts the portafilter where the filter basket is placed) is made of chrome plated brass. Designed after Rancilio's line of commercial espresso machines, the Silvia group head evenly distributes heat and reduces hotspots for more temperature consistent espresso. It has also been designed to evenly distribute water across the coffee grounds for a better extraction.

Commercial-Grade Portafilter and Filter Baskets

Keeping with the tradition of using only commercial grade components, the Silvia uses a heavy-duty chrome plated brass portafilter, which features a rugged plastic handle. The Silvia comes with two pressed stainless steel filter baskets (a single shot and double shot version), which both measure 58mm in diameter.

Commercial Quality Pressure Release System

Many high-end home and all commercial espresso machines feature a pressure relief system that helps reduce splatter if you should inadvertently remove the portafilter too quickly. The pressure relief system also greatly reduces dripping after the brew switch has been turned off resulting is a dry puck of coffee grounds for easier cleanup. This is done thanks to the three-way solenoid valve.

67 oz. Water Tank

This removable water reservoir can be filled while operating or taken out and filled at the faucet.

15 BAR Heavy Duty Pump

The secret to a great espresso is a water pump that has the power to force water through the coffee grounds to extract the full flavor from the coffee.

Drip and Cup Tray plus Cup Heater

The Silvia has a stainless steel drip pan and cup try, both easy to remove and clean. A cup-warming surface on the top of the machine lets you keep your espresso at the right temperature when it is being poured; so important for a fine espresso.

12 oz. Brass Boiler

Made of heat distributing brass, this boiler can get up to temperature quickly and stay there, with a fast recycling time. Three thermostats are built into the Silvia the control the temperature for espresso and for steam, and a third that specifically monitors the boiler to protect it from overheating if the machine is left unattended for long periods. Should the boiler overheat, the thermal protection thermostat can be reset.

One Tough Body

Brushed stainless steel construction gives the Silvia an industrial chic look; sleek, functional and unassuming. The housing is only part of the story. Inside the housing you will find that Rancilio used a rust resistant steel frame, stainless steel bolts and screws, and only the finest tubing and fittings.

So, If you ever want your at-home coffee experience to mimic those of your favorite brew house, this unit will do the trick.

Drink up!