| Year | 2007 |
| Date | 11-May |
| Volume | 198 |
| Issue | 4,299 |
| Page | 564 |
| Category | Workshop |
| Part | |
| Title | Ultrasonic Cleaning |
| Author | Ray Griffin (France) |
| Notes | Describes how to achieve powerful cleaning at a reasonable price. What is ultrasonic cleaning? Some thoughts on cleaning solutions, Ultra 8000 with 42 kHz sonic frequency, conclusion |