For a bit of advice -- Next time, do yourself a favor and don't use any seeds, hemp seeds contain their own oils and fats and contain no large amounts of THC if any at all.
One would usually take all saved stems, put them through a coffee grinder ($10) and soak the stem powder in denatured alcohol, which is pretty close to isopropyl, but a little more effective (you can't use too much, just cover the stem matter generously). Soak for about 24 hours, strain the mush through a nylon sock or cheesecloth, then do the same thing again, but let it soak for 2 to 3 days before straining again. Strain all liquid into container.
Another alternative to solvent would be acetone, as I would suspect would work quite well, as it evaprates quickly and cleanly if you buy straight acetone. Many online shaman shops use mainly acetone for their extractions. But I am not sure how acetone would react with nylon, you should better research that first.
Anyways, like said before, let your fractions of liquid that you have collected evaporate in a shallow glass or pyrex dish, when all solvent is gone, scrape up your black resin looking goo.
One might usually sprinkle a little bit of herb into the mix before all the solvent is gone, to give the goo something to absorb into. Also makes removal of the goo alot easier. This has been tested in the field and proven to be alot less messy and more pleasurable, as you aren't trying to find a way to smoke goo.
IMO - The BEST way to extract THC is the ol butane and PVC pipe trick, if you haven't heard of this one, look it up, it makes "honey hash" almost pure THC oil. VERY VERY effective - gets most people totally ripped in a couple (2) hits.
