Malt extract is made by mashing grain malt, sparging, boiling, whirlpooling etc just the same as if it was being made into beer.
Then for liquid it is vacuum-boiled to remove the water until it is 80% solids
Dry malt extract is made like they do instant coffee or dried milk, by spraying into very hot dry air which nukes it into a powder.
Liquid:
advantages: very many versions available, as per the Thos Coopers range and the German range from CraftBrewer.
disadvantages: must be fresh otherwise it can darken and get off flavours very quickly. Especially if buying from a LHBS with low turnover and premises not air conditioned.
Dried
advantages: very consistent quality and colour, suitable for pale beers as it is stable and doesn't darken
disadvantages: mostly available in only 2 colours, light and dark, although a few new varieties are coming onto the market such as dried oat malt extract etc.
Anecdotally I have found that LDME can give a fierce chill haze. I would imagine that they didn't build those factories to serve the relatively small home brew market - most extract would go to Sarah Lee, Arnotts or Mars Bars and chill haze formation isn't anywhere on their radar.
Use of Polyclar soon fixes. If I were extract brewing again, I'd go the LDME in 25k sacks.
B)
Great to see you back the last week or so Andrew & trust all is ok :icon_cheers:
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