- Reaction score
This is an alt that I brewed recently. I went to sample a bottle tonight and noticed a film in the neck of the (clear) bottle that I assumed was dusty yeast. However, when I poured the beer into a glass the film went in too, more specifically the film travelled up the side of the glass ahead of the liquid like a hydrophobic substance. As you can see in the pic, it just looks like a dirty glass but it's the way the film behaved that's got me puzzled. What could it be?
The brew was a partial using K97 dried yeast. The grain bill was munich, pils, melanoidin and carafa sp2 plus 1.5kg LME and 300g sugar. I used 78g spalt split 50/50 FWH/60min to achieve 40 IBU. OG was 1.057, FG 1.013 and the batch size was 20 litres.
The beer itself had an extended secondary because I did not like the taste of it and did not feel like bottling. I thought the k97 had thrown up excessive clove flavours. As the beer is aging the taste is improving, though it has only been in bottle two weeks which is usually not enough time for my beers to condition. I have not checked any other bottles to see if they exhibit this condition, I've drunk enough for the night. The beer also had no head but that is normal for one of my beers after two weeks in bottle at low ambient temps and a low priming rate.
My thoughts are that it might be that single bottle that had some sort of residue left within it, or the k97 has done something funny (never used it before), or I was considering as an outside chance that it was hop oil but I don't think I used nearly enough for that to be an issue. Other than that I do not know what it might be. Does anyone have any thoughts?