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

Surface Solutions Laboratory

Trial Report

Trial Number 16

(Client Number 275, Project Number 1)

Trial Purpose: To determine the ease of removal of floor coating using mechanical scrubbing

Date Run: 01/11/10

Experiment Procedure:
Dried films were conditioned at 37.8?C (100?F) in order to simulate service aging. This method utilizes the Gardner straight-line washability apparatus as a means for controlled removal of the dried films. A heavily weighted pad was employed as a means of arriving at a scrubbing force similar to that of hand scrubbing. In order to distinguish between the relative removal properties of different polishes, the number of oscillations required for complete removal was taken as a measure of removability.

Vinyl composite tiles were coated using the supplied product and a conventional floor coating. A known amount of coating was first applied to the surface and then smoothed using a 10 mil blade to ensure consistent thickness of the coating across the VCT. The coated tiles were then store in an oven maintained at a temperature of 37?C and condition there for 48 h.

The coated and conditioned panels were placed on the plate of the washability apparatus in such a manner that the oscillating brush will travel at right angles to the longer side of the dried polish film.

The abrasive pad was soaked for at least 1 min in the Green Seal approved stripper (Spartan Green Floor Finish Remover) and then placed in the assembly attached to the weighted (1-kg) boat. The pad/boat was then inverted, and the motor was turned on for one cycle. The unit was left off for 1 min and then restarted. The unit was run for 50 oscillations. The brush was kept wet by adding additional stripper solution dropwise onto the coated panel. After stopping the machine, the tile was removed, rinsed with water and blotted dry. If polish film remained, the process was repeated for an additional 50 oscillations and again examined the film after rinsing and drying. Thereafter, if any film remained, repeat for a maximum of 200 total oscillations.

The report shall include a qualitative rating according to the following terminology:
Removal Ease Number of Oscillations Required for Complete Removal
Excellent <50
Good >50 but <100
Fair >100 but <200
Poor >200

Trial Results
Wax                 Removal at 50 cycles at 100  at 150   at 200        Rating
Johnson Wax                    None      None    Some     Not complete  Poor
                               None      None    Some     Not complete  Poor
                               None      None    Some     Some          Poor
MD Stetson Universal Wax       Some      All     --       --            Good
                               Some      All     --       --            Good
                               Some      All     --       --            Good

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

The MD Stetson wax was found to have good removal rating (100 cycles). The conventional floor stripper was found to have a poor removal rating (>200 cycles). The products will be evaluated for soil resistance.