Photos of urine soaked rug. This rug is a wool Axminster. This rug was cleaned a year ago, and the urine deposits vary from a year old up to a week old. Apparently the age of the old urine does not matter because the pH of them all is about the same. Clear, distilled water was applied, and a slight agitation was given, then let soak for 10 minutes, then the litmus paper was applied.

You can see the litmus paper's color is pretty close in all tests. According to the color, the pH is about 6.5 on average.

You are looking at the back of the Axminster rug, showing the urine deposits.

--------------- First pH test, 10 minutes soaking in distilled water.

My foot shows the size of the deposits. I consider this series of deposits a class 2, because it had soaked through the rug, into the padding, although not into the flooring.

Then I let sit for 1 hour, doing nothing in the meantime, just let the distilled water soak in.

A few of the litmus papers from the initial test have darkened, which indicates a slightly lower pH, about 5.5 to 6.0.

So... if old urine is alkaline, why does it not show that? Where is the blue litmus color that would indicate alkaline?

Why is there only a indication of acidic, averageing about 6.5.

OK, if you think old urine is alkaline, show me your proof. Here's mine that old urine is acidic.

The 2 litmus papers next to the packet shows the pH of the distilled water- the upper green, pretty close to 7.0, and under that is a test of my tap water, the lower green, right out of the faucet, also pretty close to 7.0.

If you believe old urine is alkaline, show me the chemistry book, encyclopedia, physics textbook, or whatever you have.

Another point. Everyone has changed a baby's diaper. You nearly always get an ammonia smell. I have checked my grandchildren's fresh diaper, and the litmus paper always shows about the same, 6.5 pH.
So, even with an ammonia odor, the urine is still acidic, not alkaline. If you don't believe me, check it for yourself.

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