Results 1 to 4 of 4

Thread: Isomac Zaffiro Preinfusion

  1. #1
    Join Date
    Sep 2005

    Isomac Zaffiro Preinfusion

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Can someone help me out with preinfusion.. nothing in the book (yes I read the instructions) to indicate what its used for.. forgive my ignorance..


  2. #2
    Caffeine Junky
    Join Date
    May 2009

    Re: Isomac Zaffiro Preinfusion

    Pre-infusion is simply a wetting of the coffee grounds before extraction begins. *Others will probably be able to give a better explanation as to how this improves the end result.

    This is one of the features of the E61 group.

  3. #3
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Warwick, QLD

    Re: Isomac Zaffiro Preinfusion


    Pre-infusion is a process that introduces brew water under low(er) pressure (about 4-5 BAR) for a few seconds, to ensure that the coffee puck is properly saturated and allowed to expand up against the shower-screen before full brew water pressure is applied.

    The object of doing this is to try and create a homogeneous cake of coffee that presents an even overall resistance to the water flow when under brew pressure, so as to reduce as much as is practical, the tendency for channelling or fracturing of the coffee cake to occur.

    Manual E-61 Groups achieve this via a set of valves controlled by spring compression contained within the Brew Head. Other designs achieve a similar end result by a combination of switching valves via electronic means, in and out of circuit with preset Pressure Bypass Valves. No matter which method is used, the aim is the same.... Prevent channelling and fracturing of the coffee puck.... 8-)


  4. #4
    Join Date
    Sep 2005

    Re: Isomac Zaffiro Preinfusion

    Thanks Caffeine Junky and Mal.. perfect explanation. Will experiment with it..


Similar Threads

  1. Isomac Zaffiro
    By maso in forum Brewing Equipment - Midrange ($500-$1500)
    Replies: 2
    Last Post: 8th October 2008, 04:44 PM
  2. Isomac Zaffiro
    By thad in forum Brewing Equipment - Pointy End ($1500-$3000)
    Replies: 6
    Last Post: 20th August 2008, 03:21 PM
  3. isomac Zaffiro
    By Sullo in forum Brewing Equipment - Midrange ($500-$1500)
    Replies: 1
    Last Post: 1st August 2007, 03:37 PM
  4. Isomac Zaffiro
    By thomas_cho in forum Brewing Equipment (non-machine specific)
    Replies: 1
    Last Post: 14th July 2004, 02:58 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts