When you make espresso, the water flows through the shower screen of your espresso machine and hits the coffee grounds in the rivers.
These flows can disturb the coffee bed, creating small craters or channels that allow water to pass too quickly or unevenly.
This results in an underextracted or overextracted shot, which can taste sour or bitter.
A puck filter prevents this problem by creating a barrier between the shower screen and the coffee bed.
The water sits on top of it and spreads evenly over the entire surface before being forced through.
This ensures that the entire disc is in contact with the water at the same time and that no part of it is left dry or oversaturated.
Why do you need a Puck Espresso screen?
Improves the flavor and body of shots by extracting more oils and solids from the coffee.
Prevents channeling and spraying of coffee grounds, which can make a mess and damage the equipment.
Reduces the amount of coffee residue that sticks to the shower screen, making it easier to clean and maintain.
Here are some factors to consider when choosing a good espresso pod screen:
► Size: The disc screen must fit perfectly in the portafilter basket without leaving gaps or overlaps. It should also be easy to remove and replace without damaging the coffee bed or portafilter.
► Material: The chip screen must be made of durable and food grade material that can withstand high temperatures and pressures. Stainless steel is a common and reliable choice because it is resistant to corrosion and rust.
► Mesh: The puck screen must have a fine and uniform mesh that allows water to pass smoothly and evenly. Also, the mesh should be easy to rinse and dry without clogging or catching coffee particles.
► Thickness: The puck screen should be thin enough not to affect the dose or volume of the coffee, but thick enough to provide stability and support to the coffee bed.