Originally Posted by durandf
Thanks. But sorry, dont know what extract means vs partial boil batch...I had 7.5 lbs of Light LME and 1 lbd DME...but now that I think of it there was no packet of DME...could the shop have mixed it in ?
'Extract' refers to using LME and/or DME as your source of sugars for the yeast. This is opposed to all-grain, which uses malted grains as the source of sugars. You did an extract batch. Basically, someone else used the malted grains to extract the sugars, concentrating them down into DME/LME and you simply used this pre-made extract. All-grain brewers essentially make their own extract. Of course, you don't have to be fully one or the other - many brewers will use a mix of grain and extract depending on their system/process.
'Partial boil' means that you did not boil the full batch volume of your beer. If you made 5 gallons of beer, how much did you boil? If you boiled less than 5 gallons, you did a partial boil and then topped-off with water. If you boiled the full 5 gallons (or rather, more than 5 gallons to account for evaporation), you did a full-boil. Most beginner homebrewers start with extract and partial boils. And in most cases when you do extract and partial boils, your actual OG is not very far from your expected FG, assuming you used the proper volumes.
DME would not be "mixed in". If there was no packet of DME then it was left out of the kit. If you did not add in the 1 lb of DME, your expected OG will be lower by approximately 9 points (assuming a 5 gallon batch).