Portafilter for Lavazza Espresso Point Capsules in Ascaso Espresso Machines
Terms to tune your espresso by using a bottomless portafilter: Blonding denotes the color transition of a pour from dark brown and tiger-striping to a light, uniform pale blond. This normally occurs in the last third of the pull and is a signal to end the pour. This overly-blond portion of an espresso is thin, nearly flavorless, and if allowed to continue too long, will dilute the body and taste characteristics of an otherwise enjoyable shot. Channeling is the rapid passage of water through fractures in the coffee puck, which produces a thinner, under-extracted espresso. When it occurs, you'll often see sudden appearances of blond streaks in the stream of espresso; sometimes the puck will even have pencil lead-sized holes where channeling occurred. Tiger striping and mottling are leading visual indicators of a good extraction. Tiger striping is formed by the contrast of darker and lighter crema in the espresso stream; ideally it begins early in the pour and is sustained through the end. Mottling is the in-cup confirmation of a good extraction; it is the darker brown speckling and reddish-brown splotches formed on the surface of the crema.