Trial Purpose:
Reevaluate top three cleaners on supplied varnish.
Date Run:
09/22/2003Experiment Procedure:
Three cleaners from the previous trial were selected based on varnish removal. All three cleaners were used at full strength in 250 ml beakers using immersion cleaning only. Cleaning lasted for 20 minutes and was followed by a 30 second air blow off at room temperature. Additionally, one product, AW Chesterton was also used at 120 F for 10 minutes. Twelve preweighed coupons were coated with the varnish mix and allowed to dry. Coupons were weighed again to determine the amount of paint applied to the coupons. Three coupons were cleaned in each solution. After the air blow off, final weights were recorded and cleaning efficiencies were calculated.
Contaminant: Varnish Mix - Cooper's Creek Chemicals, Cooper Black Tank Paint No 739 (64742-89-8, 8052-42-4, 108-88-3); Sherwin Williams Company, V74B2 Black Asphaltum coating (64742-89-8, 64742-88-7, 8052-42-4).
Trial Results:
The 278 Super Solv removed nearly all of the varnish in either method. The AK 225 had some improvement over the 10 minute cleaning times, increasing from 60% to 80%. The last cleaner had no improvement. The table below lists the amount of soil added, the amount removed and the efficiency for each coupon cleaned.
| Cleaner | Initial wt | Final wt | % Removed |
| 278 Super Solv Heated | 0.0713 | 0.0019 | 97.34 |
| 0.0305 | 0.0009 | 97.05 | |
| 0.0418 | 0.0018 | 95.69 | |
| D Greeze 1000 20 minutes | 0.0580 | 0.0234 | 59.66 |
| 0.0541 | 0.0252 | 53.42 | |
| 0.0486 | 0.0124 | 74.49 | |
| AK 225 20 min | 0.0468 | 0.0010 | 97.86 |
| 0.0989 | 0.0371 | 62.49 | |
| 0.0794 | 0.0138 | 82.62 | |
| 278 Super Solv 20 min | 0.0696 | 0.0030 | 95.69 |
| 0.0804 | 0.0074 | 90.80 | |
| 0.0408 | 0.0013 | 96.81 |
Success Rating:
A follow up test, usually based on company input.Conclusion:
Both methodologies used with 278 Super Solv were effective in removing over 94% of the varnish from the coupons.
