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BrianC wrote:A 5.25% Bleach strength would equal (Ultra Bleach) Which is manufactured at 6% then quickly degrades to 5.25%. Standard bleach is manufactured at 3% then degrades quickly! So Ron, Is this what PMI is stating safe to use?
CMC tests on nylon rope ... ropes were immersed in a 1:10 bleach/water solution for 10 minutes, followed by a 10 minute rinse. After 14 days, the reported strength loss was 2%.
In a CMC test conducted similarly except using straight household bleach, on the other hand, the strength loss after 14 days was 13%.
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PMI suggests that a mixture of 1 part household bleach (with active ingredient of Sodium hypochlorite at 5.25% concentration) with 9 parts room temperature tap water and a 10min or less exposure time, immediately followed by a thorough rinse of room temperature water will not cause any appreciable harm to nylon or polyester ropes.
... The prudent course of action is to discard any rope about which there is any doubt.
... using gently boiling water a[t] the boiling point ...
Ernie Coffman wrote:For the good of the order, I believe this decontamination discussion started out on treating ropes because of bloodborne pathogen problems because of some SAR problems that have come up.
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