Instructables

Step 3: Filter Solution

Picture of Filter Solution
02B - Filtered.jpg
02C - Settled.jpg
02D - Dumped.jpg
In this step, filter the solution.

WARNING: You will be using Sodium Hydroxide (Lye). DO NOT drink / eat / get in eyes and USE GLOVES AND GOGGLES. This stuff will turn the oils in your hands into soap, drying them out severely and possibly causing burns. In addition, when dissolving dry powder in water, it WILL heat up. Lastly, when reacting with aluminum, it will cause the water to heat up and may generate steam. Use good judgement.
  1. Once the solution is mostly gray / doesn't bubble, filter it into a bigger container through cheese cloth (this separates the polishing powder from the metal bits).
  2. Add water through the top to wash any remaining polishing powder through.
  3. Wait for the powder to settle.
  4. Dump the top lye-water out, leave the bottom intact.
  5. Refill the container with regular water.
  6. Wait for the powder to settle.
  7. Dump the top water out, leave the bottom (and so forth, 1-2 times, to reduce the lye concentration).
 
Remove these adsRemove these ads by Signing Up