For higher quality ISO hash you need higher percentage alcohol, but why pay extra for 20% more when you can make 100% alcohol almost free. You only need 4 things for this project, 70% (or any %) ISO alcohol, salt, a jar or bottle, and some other container like a cup (large stem not required ). STEP ONE: Put your alcohol and salt into your bottle. I used 300ml of alcohol with about 10 grams of salt. Basically you want to add some salt and shake it and add more salt until it won't dissolve anymore. Once it won't take any more salt let it set for about 10 minutes until there is a thick cloudy layer at the bottom. That layer is salt water and you do not want that in your hash. Now that everything is separated out you want to pour the alcohol out into another container making sure to get none of the salt water into it. Once you have most of the alcohol store it in a sealable container until you need it to make hash.