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Trial Number 3

Client Number 367

Project Number 4

Trial Purpose:

To evaluate supplied product for grease removal from floor surfaces following CSPA DCC 17

Date Run:

10/02/2014

Experiment Procedure:

Floor cleaning for the supplied product was tested using the CSPA DCC 17 - Greasy Soil Test Method for Evaluating Spray-and-Wipe Cleaners Used on Hard, Non-Glossy Surfaces standard. A few minor deviations from the standard were incorporated into the test conducted. The Greasy Soil Test Method is a standard method that evaluates the cleaning performance of products intended for use on washable walls or other hard, non-glossy surfaces. This method provides instructions for soil application, cleaning and evaluation of spray-and-wipe cleaners under controlled cleaning conditions. This method can be used to assess product performance for cleaning a fabricated greasy soil blend applied to painted wallboard tiles. It is not inclusive of all soil or substrates typically encountered by a consumer while using these products.

Latex painted vinyl composite tiles were substituted for masonite wallboard tiles. These tiles were soiled with a mixture of melted, oily soils containing a small amount of carbon black. The tiles were dried overnight at room temperature. A measured amount of spray-and-wipe cleaner is applied to a reinforced paper towel was used in place of the sponge. The soaked towels were used to scrub a portion of the soiled substrate using a straight-line washability apparatus. The tile was rinsed after cleaning to remove loosened soil. Separate soiled coupons were cleaned with the other products being evaluated instead of using the same soiled coupon as another product. This was done to eliminate any possible cross contamination of the cleaning process. Three coupons were cleaned by each cleaning product being evaluated. Cleaning performance was taken as a linear function of reflectance value, and visually evaluated by a panel of judges.

Coupon preparation:
Two coats of white paint solution were applied to the slightly rough side of the tiles, waiting 15 minutes between each coat. Coupons were allowed to dry overnight at room temperature, and then cure them at 50°C and 50% humidity for 24 hours. Five reflectance readings were taken for each of three separate tiles to obtain a baseline value.

Soil Preparation
A mixture of three cooking oils/greases was made. A melt blend of 33% vegetable shortening, 33% lard, 33% vegetable oil and 1% carbon lampblack was made up fresh for the testing. Care was taken in the application of the soil onto the coupons so that light and heavy areas were avoided. Allow the soiled tiles to dry for 24 hours at room temperature. Five reflectance readings were made for each of three soiled tiles to obtain a soiled reference value. 

Cleaning Test
Place a soiled tile in the tray of the abrasion tester such that the direction of the soiling is perpendicular to the direction of the sponge. In place of using a sponge and pouring solution into dish for application, products were applied to the coated surfaces using 3-5 sprays from manual spray pump and 4-7 sprays onto the reinforced Wypal X60 paper towel attached to the cleaning instrument. The cleaning was performed using Gardner Straightline washability unit and conducted for the prescribed 5 cycles (10 strokes). Following the initial cycle, there was no discernable difference between the products and an additional 15 cycles were run. The coupons were immediately rinse with tap water only the surface which was scrubbed.

Panel Data
Data was also generated by a group of four respondents. Respondents first observed one unsoiled, white-painted tile. Next, respondents observed a soiled tile. After establishing the standards, the respondents rated each coupon cleaned tile from best to worst.
Cleaning data can be calculated as percent detergency in the following equation:
% DET = R(cleaned) - R(soiled) / R(unsoiled) - R(soiled) X 100

Chemistries Evaluated: Neutral Floor 0.39%, Neutral Floor 0.145%

Trial Results:

Cleaner In wt F wt %Removed L* G L* G L* G % Delta L %Delta G
Neutral Floor 0.39% 0.4799 0.3554 25.94 88.36 1.9 51.39 13.6 77.4 2.1 70.35 98.29
  0.6106 0.3676 39.8 86.98 2.0 49.18 15.5 76.49 2.6 72.25 95.56
  0.5199 0.4214 18.95 88.55 1.9 46.28 12.0 73.62 2.8 64.68 91.09
Neutral Floor 0.145%  0.744 0.6117 17.78 88.24 2.0 48.22 7.1 74.06 2.0 64.57 100.00
  0.7429 0.4837 34.89 85.56 2.1 45.11 8.1 74.48 1.8 72.61 105.00
  0.6482 0.5245 19.08 86.69 2.0 50.48 5.2 70.07 2.1 54.10 96.88

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

The higher concentration for the Neutral Floor Cleaner outperformed the lower concentration in both L readings and cleaning percent. It is important to note that the effectiveness increased by 5% for an increase of 0.245% concentration. Based on this result, you would need close to a 4% concentration for effective levels of cleaning.

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