Six pre-weighed 2"x4" stainless steel coupons, three for each cleaner tested, were contaminated with a 50/50 blend of Part A and Part B polyurethane foam after mixing at high speed with a drill press in a beaker. Coupons were immediately scrapped to remove a majority of the polyurethane foam to reflect soil levels observed in the images provided by the client. Dirty weights were recorded after soiling the coupons. Cleaners were tested at 100% concentration. The coupons were cleaned utilizing heated immersion at 125F for fifteen minutes and then air dried for five minutes at room temperature (68F). After air drying for five minutes, coupons were gently wiped down with Wypall (one wipe). Final weights of the coupons were then recorded as well as final visual observations. The visual observations were based on the criteria listed below:
1=100% soil removed
2= 75% soil removed
3= 50% soil removed
4= 25% soil removed
5= 0% soil removed