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๐-๐๐๐: ๐๐๐๐๐ฅ๐๐ซ๐๐ญ๐๐ ๐๐ฑ๐ฉ๐จ๐ฌ๐ฎ๐ซ๐ ๐ญ๐จ ๐๐ข๐ฌ๐ข๐ง๐๐๐๐ญ๐๐ง๐ญ๐ฌ
Purpose: To determine surface changes, including color, gloss, or surface deterioration, including cracking, peeling or hardening, as a result of exposure to disinfectants. Reference: N/A
Apparatus: Petri Dishes โ 100 mm D x 15 mm H (3.94โ D x 0.59โ H) Disposable graduated pipettes, capable of delivering the required 2.5 milliliter test liquid.
Clorox Healthcare Hydrogen Peroxide Cleaner Disinfectant. (Wipes)
VIREXยฎ II 256, diluted to specified concentration. (one part to 256 parts water)
Clorox Healthcare Bleach Germicidal Wipes.
Procedure:
1. Cut samples with die to a minimum size of 4 ยฝโ square.
2. Condition the specimens for minimum one hour at 80ยฐF.
3. Gently push sample into Petri dish, forming a bowl shape. Leave dish under the sample as support to make a slightly concave bowl.
4. Place 2.5 ml of disinfectant on the surface of the sample in bottom of โbowlโ. (The wipes must be squeezed and the liquid collected for pipetting onto the specimens).
5. Place treated dish in 80ยฐF oven for 24 hours. This will assure total evaporation within 24 hours so the next exposure can begin.
6. Repeat steps 4 and 5 for a total of 5 applications.
7. Remove samples from oven.
Sample Evaluation:
Clean the specimens and visually examine for discoloration or change in gloss, then flex by hand to check for cracks, peeling, or increase in hardness. Measure Delta E. 0.5 is acceptable deviation.
Evaluation:
Requirements to Pass:
At the end of five days, clean the sample and report:
Color Change: 0.5 Delta E. Max
Gloss: Slight Change, No Cracking, No Peeling, No Hardening.
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