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Toxics Use Reduction Institute · Surface Solutions Laboratory
 
Toxics Use Reduction Institute




Surface Solutions Laboratory

Trial Report



Trial Number 6

(Client Number 341, Project Number 1)

Trial Purpose: To evaluate current cleaning process for grout cleaning

Date Run: 03/17/11

Experiment Procedure:
Three cleaning products were selected for comparison. These included two supplied chemicals and steam. Cleaning was performed using a supplied cloth towel or a toothbrush/grout brush and vibratory scrubbing device.

Initial light reading were taken of grout in several unsoiled location in building restroom to create a composite baseline reading. In addition, various dirty locations were selected for a composite dirty reading.

The selected cleaner and cleaning method were used to clean a section of the dirty bathroom floor. Cleaning product was liberally applied to the floor and then cleaned for a minute with consistent mechanical force. At the end of the cleaning, the surface was wiped with a towel to remove excess dirty and cleaning solution. Once dried, "clean" light readings were taken to determine cleaning effectiveness. Furthermore, visual ranking of each section of cleaned grout was compared against all cleaning processes.

Trial Results
Visual Observations
Scrubbing cleaning with either the hand held brush or mechanical agitation both outperformed the cloth cleaning application. The TMI Neutral
Disinfectant product with the mechanical agitation was ranked highest based on visual observations followed by the DfE 401 all purpose cleaner at
2.3%. The DfE at 4.7% with mechanical agitation was ranked the same as the Neutral disinfectant with the hand held brush. Steam cleaning with a brush
(no cloth) was the next most effective cleaning process (based on visual rankings).

Color-Gloss Evaluation
The Neutral Disinfectant with the hand held brush resulted in the highest gloss-color reading after cleaning. The steam cleaning with a brush (no
cloth) had the second highest level.

The collected data and observations for the cleaning processes are listed in the table.

Method           Ave Unsoiled   Ave Soiled     Clean         Lc-Ls        Lu-Ls    [(Lc-Ls)/
                     Lu           Ls            Lc                                 (Lu-Ls)] *100
Neutral cloth        77.67        45.65        53.48        7.83        32.02        24.46
Neutral brush        77.67        45.65        57.34       11.69        32.02        36.51
Neutral sonic        77.67        45.65        54.02        8.37        32.02        26.14
DfE 2.3% cloth       77.67        45.65        49.75        4.10        32.02        12.81
DfE 2.3% brush       77.67        45.65        51.23        5.58        32.02        17.43
DfE 2.3% sonic       77.67        45.65        53.17        7.52        32.02        23.49
DfE 4.7% cloth       77.67        45.65        51.56        5.91        32.02        18.46
DfE 4.7% brush       77.67        45.65        44.71       -0.94        32.02       -2.94
DfE 4.7% sonic       77.67        45.65        47.90        2.25        32.02         7.03
steam small head     77.67        45.65        50.82        5.17        32.02        16.15
steam medium head    77.67        45.65        49.59        3.94        32.02        12.31
steam no cloth brush 77.67        45.65        56.25       10.60        32.02        33.11

Method             Visual Rank   Gloss-Color Rank
Neutral cloth          9         4
Neutral brush          3         1
Neutral sonic          1         3
DfE 2.3% cloth        10        10
DfE 2.3% brush         5         7
DfE 2.3% sonic         2         5
DfE 4.7% cloth        12         6
DfE 4.7% brush         8        12
DfE 4.7% sonic         3        11
steam small head      11         8
steam medium head      7         9
steam no cloth brush   5         2


Success Rating
A follow up test, usually based on company input.

Conclusion
Additional cleaners will be selected to determine more effective grout cleaning options.