Knowledge hub.
Guides, technical explainers and buying advice from the engineers behind Carimali, Elektra, Heylo and Bellezza.
Can a café charge more for cold drinks?
Customers hold a firm idea of what a flat white costs and notice every increase, but they hold no equivalent reference price for a cold foam or an iced latte. That gap is where the pricing room sits, and the large chains have already taught mainstream customers to accept it. This sets out the mechanism, what the cold menu asks of milk equipment, and what to check before adding one.
How burr sharpness changes your grind — and your cup
Burrs fracture beans by shearing them. A sharp edge fractures cleanly; a dull one crushes, producing more fines and a wider particle distribution at the same setting. Because burrs dull gradually rather than failing, the decline is invisible day to day and only obvious when you compare.
Grinder maintenance and calibration schedules for busy sites
The grinder has more influence over the cup than any other device on the bar and receives less maintenance than any of them. A schedule built around daily, weekly, monthly and throughput-based tasks — with a written record of the setting — protects consistency more cheaply than any equipment upgrade.
Flow control on a home machine
A practical guide to using a flow control valve on a home espresso machine — what to do at each phase of the shot, what to watch, how to read the pressure gauge as feedback, and how to tell whether anything you changed actually worked.
Is there a perfect brew temperature?
There is no single correct brew temperature, because the right number depends on the coffee, the grind and the ratio you are running with it. The question that matters more is whether your machine actually holds whatever number you chose — a machine steady at 92 °C beats one averaging 94 °C while swinging.
Water for coffee: hardness, alkalinity and mineral content explained
Water is almost all of what is in the cup, and two of its properties — hardness and alkalinity — are routinely confused with each other. They are measured separately, they do different things, and understanding the difference is what turns water from a mystery into a variable you can manage.
The complete guide to espresso extraction variables
Espresso is governed by around ten variables that all interact, which is why changing one thing often appears to change everything. This is a reference to each variable, what it does, how it couples to the others, and a disciplined method for adjusting them one at a time.
How to clean a home espresso machine properly
Most home espresso machines that taste bad or fail early are not badly made — they are dirty, and dirty in the places nobody looks. This is a practical cleaning routine organised by interval and by machine type, with the parts that matter separated from the parts that only look dirty.
Cold brew methods for cafés, compared
Cold brew is a stock item rather than a drink, so choosing a method is mainly a decision about capital, floor space, lead time and waste risk. This compares immersion, slow drip, nitro, accelerated brewing and flash chilling on what each actually costs a venue to run.
Choosing a water treatment system for a commercial coffee machine
You cannot specify water treatment without first knowing what is in your water, and the default answer — a softener — is frequently the wrong one. This is what each category of treatment actually does, and how to match one to the problem you have.
How to cost and price a cup of coffee properly
A method for building the real cost of a drink from your own figures — coffee, milk, consumables, labour, energy, water, equipment amortisation and waste — and then using it to set prices, edit the menu and see which drinks carry the business.