IMS vs VST Baskets Comparison

Role of Filter Baskets in Espresso Extraction
IMS vs VST: Shapes & Designs
Flavour Differences between IMS and VST Baskets

Role of Filter Baskets in Espresso Extraction

Filter baskets are critical elements within espresso machines, responsible for holding the coffee grounds during the brewing process. The shape and design of these baskets significantly impact the extraction quality and consistency. The basket’s perforations determine flow rates and interaction between water and coffee, affecting factors like brew time, extraction efficiency, and flavour profile. An optimal basket design ensures uniform water distribution, promotes even extraction, and facilitates easy cleaning, contributing to the production of high-quality espresso shots with balanced flavours.

IMS vs VST: Shapes & Designs

The significant differences between IMS and VST lie in the shapes and designs of their respective filter baskets, and these distinctions have a substantial impact on the quality of your espresso.

Feature	IMS	VST

number of holes	300 ~ 400	500 ~ 700
holes distribution	Packed in the middle	Evenly spaced holes over the surface
direction of holes	Cone shape	Straight downward
sloping sides	Slightly narrower towards the bottom	Straight sides
bottom surface	Arched	Flat

Difference of shapes and designs between IMS and VST

Flavour Differences between IMS vs VST Baskets

More number of holes on the bottom surface allows water to flow more easily through the basket. Assuming all other variables are controlled, the extraction brew time using the VST filter basket will be correspondingly shorter compared to using the IMS filter basket. Consequently, the grind size should be adjusted to achieve the same (or similar) brew time for each filter basket; finer grounds are needed for the VST, while coarser grounds are required for the IMS. During extraction, water extracts flavour compounds more readily from finer grounds. This could potentially lead to over-extraction though.

So, at this stage, you should know what sort of coffee beans you are using and determine which filter baskets you will use. For example, if you are using dark roast and want to take most out of it, you can pick IMS. Or if you are using some sort of coffee beans with great aromatic impact, you may choose VST with shorter brew time so that you can pull out those aromatic compounds without concerning of bitter aftertaste.

Conclusion

To conclude, comparison between IMS vs VST has clarified for you to choose between these two baskets. Whether to use IMS or VST, it ultimately depends on individual’s specific needs, brewing style, and espresso machine. As a barista, consider your preferences, budget, and desired extraction results when making your decision. Embrace experimentation and let your taste buds guide you towards the filter basket that complements your craft best. Happy brewing!