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Trial Number 10

Trial Purpose:

To test Free & Clear Glass cleaner compared to Mrs.Meyers for the removal of glass soil on Glass and Chrome.

Date Run:


Experiment Procedure:

Three coupons for each substrate for each cleaner were weighed for initial weights. About 0.15-0.2 g of Glass soil that was made previously was put onto the coupons and was left to dry overnight (24-hour dry time). The following day, dirty weights were taken and recorded. Three coupons of the same substrate were placed in the SLW Machine; there was 3 sprays per Wypall (one Wypall per substrate, per cleaner) and the SLW Machine was run for 20 cycles (30 seconds of cleaning). The coupons were taken out and left to dry for another 24 hours. After the 24 hours, they were weighed again for final weights. Streaking and Filming scores were then recorded. During the cleaning process, one glass coupon from Mrs. Meyers broke during the SLW Machine wiping. This coupon was taken out and the cleaning average was taken from the remaining two coupons. 

Cleaners used:

  1. Mrs. Meyers RTU
  2. Free & Clear Glass RTU

Substrates Used:

A. Glass

B. Chrome

Trial Results:

Free & Clear performed better on glass than Mrs. Meyers did and had an average of about 93% removal compared to Mrs. Meyers at 84% removal. However, it only removed an average of 67% on Chrome substrate whereas Mrs. Meyers cleaned about 84%. Free & Clear was effective for the removal of glass soil on glass but not on chrome, noticeable amounts of soil were left on the chrome coupons, but the glass ones appeared fully clean. Mrs. Meyers coupons had some soil left on the sides of the coupon but were clean throughout the middle, it was almost fully effective but would have needed more wiping to remove all the soil. 

Cleaner Substrate Initial wt. of cont. Final wt. of cont. %cont. removal Average
1 A 0.1795 0.0308 82.84 84.13
0.1578 0.0230 85.42
B 0.1747 0.0414 76.30 83.89
0.1843 0.0224 87.85
0.1724 0.0215 87.53
2 A 0.1552 0.0169 89.11 92.61
0.1449 0.0080 94.48
0.1670 0.0096 94.25
B 0.1918 0.0926 51.72 66.53
0.1970 0.0453 77.01
0.2155 0.0628 70.86

As for filming and streaking scores, there was minimal filming on all coupons from both cleaners. There however was a lot of streaking that was left on the glass substrates from both cleaners. The streaking was only noticeable on the chrome substrates when looked at very closely, but the glass was noticeable from afar. The N/A indicates the broken coupon. Scoring for Filming ranges from 7 to 1, 1 being no visible filming to 7 having high filming. Similarly streaking ranges from 7 to 1 with 1 being no visible streaking to 7 having high streaking. 

Cleaner Substrate Filming Streaking
1 A 2 6.5
1 6
B 2 2
1 2
1 1
2 A 1 6
1 5.5
1 6
B 1 3
2 2
1 3

Success Rating:

A cleanliness study, addressing only various analytical techniques.


Free & Clear was effective for the removal of glass soil on glass at about 93% but not on chrome, it cleaned significantly less on chrome than the comparative product at 67%. Mrs.Meyers was somewhat effective for the removal of glass soil on both substrates, but averages remained around 85% and some soil was left on the sides of the coupons. 

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