Eight cleaners were selected from the previous trial based on effective cleaning of the wax. Seven aqueous cleaners were diluted to 5% using DI water in 600 ml beakers. One powder cleaner (Uniclean KC 3000) was diluted to 2% using DI water in 600 ml beaker. All eight cleaners were heated to 150 F in a Crest 40 kHz Ultrasonic tank filled with water.
Twenty-four preweighed glass coupons were coated with wax by heating the coupons with a Master Appliance heat gun and wiping solid wax across the surface. Once coupons were cooled, a second weight was recorded. Three coupons were cleaned in each solution. All cleaners were used for 10 minutes.
Following cleaning, the coupons were rinsed in a DI water spray at 60 F for 15 seconds and dried one day at room temperature. Final weights were recorded and efficiencies were calculated. Observations were made on bath conditions following cleaning to determine which products could be reused more effectively.