WE ARE OPEN
We are open and we really appreciate any orders from you at the moment, thank you!
We are allowed to run training courses - no group courses however.
We are also open for meetings.
We are following strict government guidelines to ensure your products from us arrive safely. Coffee is roasted at a temperature that kills bacteria and viruses including Corona C-19. Coffee beans and ground coffee are not touched by our team.
The virus does not survive long on dry / impervious surfaces. We recommend to wipe down the outside of the box when it arrives with antibacterial wipes just in case.
Consistent, great tasting coffee is an important part of running a successful coffee shop. There are many factors that affect the flavour of your coffee; the water temperature used to brew espresso being one of them. Espresso equipment plays a large part in maintaining this brewing temperature as well as the methods of the barista. Ensuring the group handle is kept at a consistent temperature and allowing the espresso machine to be fully warmed up are two things you can do, but is there more you should be aware of?
A good place to start is by understanding the type of boiler inside your espresso machine as each maintains water temperature differently. From heat exchangers to true boilers; the level of temperature consistency your espresso machine provides is something to consider. By design, many espresso machines are known to overheat the brewing water when the machine is idle. A ‘cooling flush’ is a concept known to many baristas, not only to ensure the group head is clean, but also to control this temperature. If you have ever noticed water sputtering from a group head along with excess steam, then you will know what we are talking about. To eliminate this, a cooling flush can be utilised between shots. This is where an amount of water is flushed from the group head after you have removed the group handle and before the next espresso is extracted. At Limini Coffee we teach this to students as a standard part of an espresso making routine. But how long should you flush the water for and what affect could this have on the taste of your espresso?
Through our own tests and experiences we have found that an espresso machine being used continuously benefits from a quick two second flush between each drink. Any longer than this and we run the risk of cooling the brewing water too much and increasing the chance of sourness in the espresso. This sourness is evident at a flush of four seconds or more. One lesson here is to ensure that we are not distracted when flushing the machine and run the water longer than we intend (we have all done this at some point whilst chatting away to our customers…)!
The question then is if your machine has been sitting idle, is a two second flush enough? Again, through our own tests and experiences we have found that when a group has idled for longer than three minutes, a longer flush benefits the taste of the espresso. For us, a four to eight second flush rids the group of its’ excess heat. The length of the flush depends on the temperature stability of your espresso machine. This issue with brewing temperature is particularly evident in shops that do not use one of the groups as often as the other(s). If the group has been sat for a long period of time and is then used without flushing, the difference in the quality of the espresso is noticeable and the coffee has a more bitter taste.
Overall, we believe it is advantageous to add group flushing to your espresso brewing routine if consistent coffee is your goal. Small flushes between brewing helps to maintain water temperate as well as cleanliness and a slightly longer flush could be needed after idle time. Experiment with your espresso machine and see the affect too long a flush or no flush at all has on your espresso quality and flavour.
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Limini CoffeeThe Roastery
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Monday - Friday | 09:00 - 16:30
Closed bank holidays