CobosocialのThe Golden Promise of Whiskyには、次のように書かれています。
After the year of 1994, The Macallan lower the use of Golden Promise and introduced barley that have a higher alcohol per tonne transfer rate. They launched the “Fine Oak” series back in 2004, which will mark as one of the changing point in the history of The Macallan. Even though the sherry cask stays as a line that continues, but Golden Promise seems to be gone forever.
The result is inevitable as the next generation of barley varieties- like Optic and Chariot , have been proven themselves to be more cost effective. They became more resistant to different infections, survive adverse weathers, higher alcohol per tonne transfer rate, as well as a shorter length of dormancy (Golden Promise would be 2 months compare with Optic’s 6 weeks). All of the above leads to a lower production cost for both the farmers and the distilleries.
Russell noted that Macallan is very particular about the barley and yeast it uses. Currently about 30 percent of the barley is golden promise and 70% is chariot. Both of these strains of barley are high demand. Golden Promise is quite hard to get. According to Russell it is not as popular with farmers since it produces lower yields that a strain such as Chariot, however, it does produce a superior sugar compound he referred to as ester notes. While Macallan does not have floor maltings, it does provide very clear specifications to its malters about the purchase and malting of the barley. This becomes quite complex but is key to distilleries such as Macallan. For example, they may specify the amount of nitrogen that is used on the fields since nitrogen may increase yield but may lower sugar production for the maltings.
Macallan’s mash tun is 6.8 tons and produces 6 million liters of worts per year. After the last infusion of water at approximately 90 degrees centigrate the worts flow into the washbacks. They have 16 washbacks at Macallan and they use 4 kinds of yeast which they mix in a yeast mixing vessel. The only other distillery we saw with such a mixer was at Glenkinchie. Macallan uses brewers and distillers yeast in a complex mixture that includes 50 percent cultured yeast. In fact, Macallan is in the minority in using brewers yeast which other distillers have stopped using for fear of bacterial growth.
Interestingly, Macallan switched to stainless steel washbacks about 5 or 6 years ago. Much of the debate about wood versus stainless steel has to do with useful life of the wood, bacterial overgrowth that wood washbacks might develop and so forth. We heard many different opinions during our trip but with no clear view as to which approach is the best. That’s what makes the process so interesting.
‘The Mystery of Sherry Oak Maturation” For reasons not even science can wholly explain, whisky has always matured best in oak casks that have contained sherry. Due to increasing expense and scarcity, other distillers no longer insist on sherry casks. The Macallan directors do. Journeying annually to the bodegas of Jerez, Spain, they buy fresh oak casks into which they pour mature , carefully chosen sherries, then keep them for two further years in Spain before having them shipped over to be filled with whisky. The results are shown partly in The Macallan’s rich golden colour, partly in the ‘nose’ and wholly we may venture?,… in the tumbler. 「マッカラン7年」ラベルより引用
「シングルモルトのロールスロイス」というフレーズが独り歩きして、いつしか日本でマッカランを宣伝するときに必ず用いられるようになりましたが、元々はハロッズのパンフレット(Tony Lord, Colin Parnell (ed.), Harrods Book of Whiskies, Decanter Magazine, published for Harrods Ltd., 46p., 30cm, 1978)から引用されたものです。
1978年といえばマッカランの黄金期、延いてはロールスロイスの黄金期でもあります。シルヴァーシャドウ(1965年-1977年、ファントムVI(1968年-1991年)、コーニッシュ(1971年-1987年)と往年の名車が揃い、ロールス・ロイスもベントレーもBMWやフォルクスワーゲンの傘下ではなく手作りに近い工程で、エンジンも独自設計だった時代です。時は下りプラットフォームの共通化やオートメーション化が訪れ、今でももちろん二社はプレミアムレンジとしてその地位を確立してはいますが、当時のロールスロイスと今のロールスロイスは、マッカランと同じように違うものとして存在します。
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