Four products were selected from the lab's on-line database, www.cleanersolutions.org, based on past testing results matching client supplied information. All products were used at full strength in 600 ml beakers. Each solution used at room temperature in a Crest 40 kHz ultrasonic tanked filled with water and degassed for 5 minutes prior to cleaning.
Sixteen pre-weighted coupons were coated with supplied photo resist from company using a hand held swap. Each coupon was coated 3 times manually.
Coupons were allowed to sit overnight and reweighed to determine the amount of resin applied.
Three coupons were immersed into each solution at room temperature for 5 minutes using ultrasonic energy. Following cleaning, coupons were rinsed in a tap water bath for 15 seconds then dried using compressed air at room temperature for 60 seconds. Final clean weights were recorded and cleaning efficiencies were calculated for each product.