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Trial Number 1

Client Number 493

Project Number 1

Trial Purpose:

To evaluate the effectiveness of Libman All-Purpose Cleaner against a comparative brand after sitting for 7 days at 120F.

Date Run:

05/12/2022

Experiment Procedure:

The two cleaners used in the experiment were placed in an oven at 120F for 1 week to simulate how the product would perform after being exposed to hot enclosed conditions for long periods of time. The cleaners were allowed to sit at room temperature for 24 hours before being used. Nine pre-weighed coupons per cleaner, three of each substrate, were contaminated with Hucker's Soil Formulation (Jiff Creamy Peanut Butter 9.2%, Salted Butter 9.2%, Arrowhead Mills stone-ground wheat flour 9.2%, Egg Yolk 9.2%, Evaporated milk 13.8%, Distilled water 45.8%, Printer's ink with boiled linseed oil 0.9%, Shaws saline Solution 2.7%) using a handheld swab and dried for two hours at room temperature (68 F). The contaminated coupons were weighed before placing three coupons per cleaner of the same substrate into a Gardner Straight Line Washability (SLW) unit. A Kimberly-Clark Wypal reinforced paper towel was attached to the cleaning sled. The Wypal and each coupon were treated with three sprays and cleaned for 20 cycles (~30 seconds of cleaning). Clean coupons dried for 24 hours before final weights were taken.

Trial Results:

After 1 week of treatment at 120F, both bottles did not appear to outwardly change and experience any melting issues.

Overall, Libman All-Purpose Cleaner was more effective at removing the contaminant than Weiman Cooktop Oven Cleaner. In comparison to the previous test (Trial #0) where the cleaners were used as is, without any heat treatment, these cleaners did not perform as well. Previously, with no heat treatment, Libman All-Purpose had an overall average removal of 97.63 compared to the heat treated 93.61. Weiman Cooktop's results followed a similar pattern with no heat treatment having a 94.85% over average removal and with heat treatment, 88%.

Cleaner Substrate Initial wt of cont. Final wt of cont. %Cont Removed Average % Removal Overall % Removal
Weiman Cooktop Ceramic 0.1275 0.0416 67.37 84.86 88.00
0.0687 0.0061 91.12
0.2778 0.0109 96.08
Plastic 0.3627 0.0471 87.01 87.96
0.3471 0.0583 83.20
0.3758 0.0238 93.67
Painted Metal 0.3229 0.0155 95.20 91.17
0.1602 0.0192 88.01
0.3389 0.0329 90.29
Libman All-Purpose Ceramic 0.1532 0.0036 97.65 98.01 93.61
0.2695 0.0042 98.44
0.2519 0.0052 97.94
Plastic 0.4135 0.0608 85.30 91.80
0.3438 0.0177 94.85
0.3791 0.0180 95.25
Painted Metal 0.4940 0.0621 87.43 91.02
0.2731 0.0256 90.63
0.2618 0.0131 95.01

Libman All-Purpose was still more effective than Weiman Cooktop under untreated and treated conditions.

Cleaner  Condition Overall % Removal
Libman All-Purpose Untreated  97.63
Treated for 1 week at 120F  93.61
Weiman Cooktop Untreated  94.85
Treated for 1 week at 120F  88.00

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Both cleaners had reduced average percent removals after being treated for 1 week at 120F. Under both sets of conditions, Libman All-Purpose Cleaner (untreated and treated) remained more effective than Weiman Cooktop Oven Cleaner at removing Hucker's soil from ceramic, painted metal, and plastic substrates.

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