marspiter
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Just an observation. The glue would protect the cotton to a certain degree. However cotton has certain properties that well...make it cotton. Cotton has certain capillary actions that cause it to absorb liquids. So if any of the cotton was exposed that capillary action would cause the liquid to absorb into the entire fiber strand. So you could still have glue and not have cotton because the "ends" of the cotton fiber on the edges would be exposed and would absorb the liquid (water, decomp fluids, what have you) thus causing the fiber to deteriorate and leave the glue behind.
So your assumption that the tape was made with out cotton because the glue is still present and would protect the cotton is actually flawed when you consider the capillary nature of cotton and it's absorption of fluids. Hence why cotton works great for oil lamps and most industrial mop heads are cotton too.
Your reading into my comment something that isn't there actually. Do to cottons nature (capillary action) if any cotton were exposed and not protected by the glue and plastic (such as the ends) it would cause that fiber and the fibers around it to become "wet".
In high school they do an experiment where you scratch the surface of a penny and place it in acid. The zinc in the penny will deteriorate in the acid and leave the copper jacket of the penny unharmed...thus you get a hollow penny.
So you would have the same kind of thing going on. The cotton fiber would deteriorate as shown by the T-shirt evidence and http://etd.lsu.edu/docs/available/etd-0407103-131120/unrestricted/Gordon_thesis.pdf
In the items I mentioned (mop heads) cotton is not used because of it resistance to deterioration. It is used because of its absorption quality. Anyone who has used a cotton mop and left it in the bucket knows a cotton mop head will deteriorate. As joypath was saying the t-shirt was of a treated higher quality type cotton then what would be found in the tape that and there would be more cotton fiber in the t-shirt then in a 9 inch piece of duct tape.
The pictures of the t-shirt clearly show how cotton will deteriorate when exposed to the elements. So my original statement was to show the flawed logic in thinking that the glue and plastic would "protect" the fibers....because it wont do to cottons absorption. Also cotton does not with stand degradation as shown in the study linked above and the photos of the shirt. My examples were used to show cottons capillary nature (absorption). Not exactly sure how my examples show cotton is resistant to deterioration.
HTH
Given the fact that the cotton in the tape was protected by backing and glue, would it not take sometime before the cotton would be exposed to the water. After I read the water report requested by Jeff Ashton, I could not see where "area A" had been under water very often. How is it possible with so much protection, and to include overlapping that all of the cotton deteriorated?
On another note, I have asked a question in the chemist thread that has not been answered. Given the fact that Chloroform in high levels, 200 ppm vs normal 200 ppb is able to kill humans, how can it not kill flies? I hope you can help answer that in the appropriate thread thanks.
I tried to answer this question for you however I guess you missed it so I added my post and bolded a statement in another to explain why the cotton would be gone.
Also with keeping in mind the absorption of the cotton fibers, the glue and plastic would have another effect. Any moister that the cotton fiber did absorb would stay in the fiber longer then fibers with out the "protection" because of the glue and plastic holding it in (along with the capillary effect) and keeping it from drying out longer. I think it's pretty much been established that cotton will deteriorate and given the conditions can happen somewhat rapidly (at least in the time frame that Caylee was in the elements).
The t-shirt shows full well what can happen. The tape I would say had significantly less cotton then the shirt. I would argue that the plastic and glue would not protect the cotton fiber in the conditions the tape was left in to the extent that you have presented. Given cottons nature to absorb liquids its very feasible that the cotton was deteriorated. Also Henkel didn't make that tape with out cotton fibers (as evident by many posts with documented evidence) which also adds greater weight to the cotton being there and then deteriorated.
Just a question do you have any evidence to show that Henkel made that exact brand/type/model of tape and didn't use cotton fibers?