GLASS BEADS

1. 0.45 - 0.5mm beads (Sigma)
   
2. Clean by soaking in nitric acid -->stir bar, O/N.**
   **Note, dispose of acid in appropriate flask.
   
3. Wash w/ lots distilled water (til pH to that of water, allow to soak ~2H between changes to ensure clean)
   
4. Dry before use (bake in oven)
   
   Microbeads: Cataphote Inc. 1-800-221-2574, Class 4A, size 3545 (our batch is 90708)
   
   This takes ~2-3 days until done.