Mark Prince wrote:The next time I crack the binding on it, if you haven't found the specific references by then, I'll take a look.
I went through it last night and couldn't find anything supporting the "otherwise never leave the bean" contention. That doesn't mean it isn't there, of course, only that I couldn't find it in the hour I browsed.
What the heck is going on!!!???
I just went through the first edition again last eve (well, skimmed it), looking for "C02" and "Carbon Dioxide" everywhere I could, and besides some references in the grinding section (CO2 released, carrying along with it the chemical compounds that make up aroma), and frequent mention of emulsified oils and non solubles, then sideways mentions of CO2 making up a lot of the crema release, I couldn't find a direct mention of the "CO2 is the transport mechanism" in the book. It could be there, I couldn't find it this read through.
But I swear up and down, this is what I took away from the Illy book when I read it several times over back in 2002. And, it was one of the points I briefly talked to Dr. Illy (RIP) and his assistant about in Boston at SCAA. And even before I read the book, others in espresso would parrot this mantra; I remember talking to David Schomer and John Blackwell, as well as others about it back prior to 9/11, and I have memories of one or both of them referencing the Illy book to me as how to find out more about it.
I've been scratching my head about this for the last few hours. I *know* I read it, and remember finding the scientific data on it hard to understand. There is two other illy books - one I own, but it's out on loan now - the Book of Coffee by Francesco and Ricardo Illy; and there's that other book which I borrowed once (I think from Kent Bakke), the one that has the visuals of the transparent portafilter setup. I read both of these around the time I read Chemistry of Quality, and maybe all these years I've been confusing the source.
I'm also wondering if it's mentioned in Schomer's first books. I've also lent out my copy of that one, (same person who has my Illy Book of Coffee book) so I can't peruse.
Has anyone got either of the other Illy books (esp. the transparent portafilter one, which I don't have, and don't know the title of) to check this out? Now it's getting frustrating. I'm going to go through the Chem Quality book again over the weekend to see if I missed it.