This is the IMS 28.5E Ridgeless Portafilter Basket designed to fit the 58mm - 58.5mm coffee tamper. It fits all standard 58mm portafilters.
It has a height of 28.5mm, meaning it is designed to fit between 18-22g of coffee, depending on your coffee and grind size. This is the most common/popular size.
These baskets are geared towards optimising extraction rates, through a combination of precision laser etched holes and ridgeless walls, allowing the barista to tamp deeper, house more coffee and not be restricted by the traditional ridged walls of regular baskets.
SHAPE Border: Ø 70 mm (B70) (H28.5)
CORPO: Ø 60 mm for Ø 58 mm tamper
SHAPE: Cylindrical with Convex Bottom The shape was created by IMS to obtain the proper ratio between the base and height of the coffee puck in relation to capacity.
The filter is cylindrical with a convex bottom to collect the coffee towards the centre during percolation. This shape has been designed to exploit the whole coffee puck, which also facilitates drying and expulsion.
IMS. perforation is exclusive and patented.
PERFORATED AREA: Ø 49 mm area optimised in relation to the shape of the filter.
NUMBER OF HOLES: 715 HE spacing (E) The number and distribution of the perforations are designed to balance the delivery in relation to the height and shape of the filter and perforated area.
HOLE DIAMETER: 0.30 mm
SHAPE OF THE HOLE: CIRCULAR with CONICAL cross-section.
COMPETITION PERFORATION: Re-laminated and Recalibrated
TUMBLING: Wet Vibro finishing with ceramic inserts and drying with corncob
PICKLING: Passivation and preparing of the material ELECTROPOLISHING: smooth surface with unmatched sanitary and non-contaminating qualities is obtained.
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