Gardner straight line washability test

Use 1 to 2 oz/gal for cleaning floors and walls. Use full strength to remove oil, grease, tar, gum, asphalt, fresh paint, adhesives, scuff marks and lipstick stains. Brush where necessary. Rinse with water. For prolonged use, wear rubber gloves. Gardner Straight Line Washability Test ... 

Malik presented data [27] on the detergency of C12 and C13.6 SMEs via a modified Gardner Straight Line Washability Test [39]. The test solutions consisted of 0.6% of the test surfactant and 0.12% tetrapotassium pyrophosphate in 140 ppm as CaCOj water at 25°C. The C12 SME gave equivalent performance compared to decyl and branched dodecyl diphenyl oxide disulfonates. The Cl3.6 SME slightly outperformed the Cl2 SME but was not quite as good as the C8-10, 5-mole ethoxylated phosphate ester that was also included. Both SMEs contained the analog sulfonated fatty-acid sodium salts as secondary snrfactants. 

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