SWIM followed normans STB tek.
1. 850ml tap water + 60g lye in 1L milk jug
2. add MHRB to ^ and shake for 5-10 minutes vigorously, leave for 24+ hours, shaking for 5-10 minutes throughout the 24 hours a couple times.
3. transferred the solution into 2 separate jars (after learning HDPE isn't safe with naptha) since SWIM didn't have a jar big enough for all of it
4. SWIM heated 140ml naptha in hot water bath and poured 70ml into each jar, swirled around the jar to mix the naptha with solution for 5-10 minutes then allowed the layers to separate and repeated this 3 more times.
5. after 4th separation, SWIM used an eyedropper to take out top layer of naptha, combined both pulls from the 2 jars and placed in a container with sealed lid.
6. SWIM placed in a very cold freezer for 24+ hours, after the crystals had precipitated SWIM poured the naptha through a coffee filter (crystals in filter after drying), saved the naptha for second pulls, and placed the container upside down in freezer with lid on for 30+ minutes
7. SWIM took out the container and place beside window with a lid covering 3/4 of container to allow remaining naptha to evaporate.
SWIM noticed the white crystals he had would turn yellow as he scraped them off the container. What's the reason for this.. is it safe?