Lallemand LalBrew™ Köln is ideal for brewing traditional Kölsch-style beers and other neutral ales. The neutral character of this strain accentuates delicate hop aromas while imparting subtle fruity esters. Through the expression of a β-glucosidase enzyme, Köln can promote hop biotransformation and accentuate hop flavor and aroma. Colder fermentations will be more neutral in character, while warmer fermentation will have a more fruit-forward ester profile. LalBrew™ Koln produces neutral to slightly fruity and estery flavors and aromas. BEERS TO BREW: Kölsch-style beers*, neutral ales, Blondes*, session IPAs, Altbier. * Ferment on the cooler side of the temperature scale. INGREDIENTS: Yeast (Saccharomyces cerevisiae), emulsifier E491. FERMENTATION: Ideally at 12-20°C (54-68°F). PITCHING: 22g (2 sachets) per 20-23 L (100 - 200g/hL to achieve a minimum of 5 - 10 million cells/mL). ATTENUATION: Medium to High. FLOCCULATION: Medium to High. SEDIMENTATION: Fast. REHYDRATION INSTRUCTIONS: Rehydration of Köln is recommended for use, and will reduce osmotic stress on the yeast when rehydrated and pitched in liquid form. Rehydration guidelines are quite simple and present a much lower risk of contamination than a starter, which is unnecessary with dried active yeast. Sprinkle the yeast on the surface of 10 times its weight in clean, sterilized water at 30-35°C (86-95F). Do not use wort, or distilled or reverse osmosis water, as loss in viability will result. DO NOT STIR. Leave undisturbed for 15 minutes, then stir to suspend yeast completely, and leave it for 5 more minutes at 30-35°C. Then adjust the temperature to that of the wort and inoculate without delay. Attemperate in steps at 5-minute intervals of 10°C to the temperature of the wort by mixing aliquots of wort. Do not allow attemperation to be carried out by natural heat loss. This will take too long and could result in loss of viability or vitality. Temperature shock, at greater than 10°C, will cause the formation of petite mutants leading to long-term or incomplete fermentation and possible formation of undesirable flavors. Köln yeast has been conditioned to survive rehydration. The yeast contains an adequate reservoir of carbohydrates and unsaturated fatty acids to achieve active growth. It is unnecessary to aerate wort upon first use. When using Lallemand Brewing Yeasts, you may repitch the yeast just as you would any other type of yeast according to your brewery’s SOP for yeast handling. STORAGE: Köln yeast should be stored dry below 10C° (50°F). Köln will rapidly lose activity after exposure to air. Do not use 500g or 11g packs that have lost vacuum. SHELF LIFE: Refer to best before end date printed on the sachet. Opened packs must be re-closed, stored in dry conditions below 4°C, and used within 3 days. If the opened package is re-vacuum sealed immediately after opening, yeast can be stored for up to two weeks below 4°C. TYPICAL ANALYSIS: Percent solids 93% - 97%Living Yeast Cells ≥ 5 x 10^9 per gram of dry yeastWild Yeast < 1 per 10^6 yeast cellsBacteria < 1 per 10^6 yeast cellsPathogenic micro-organisms: in accordance with regulation
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