Forums: Skydiving: Gear and Rigging:
Blood On Gear (Not Morbid)

 


jfields  (C 33595)

Oct 1, 2001, 8:57 AM
Post #1 of 8 (836 views)
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Blood On Gear (Not Morbid) Can't Post

This isn't morbid or a troll, but I need to find out how to get blood off of gear.

As I was setting up for a 3-way tube exit from a King Air this past weekend, I snagged my pinkie finger on the door track. The exit and the dive were great, but when I was gathering up my gear, I noticed dark spots on the mesh of my pilot chute and some of the lines and stuff. It was then that I actually saw a my finger dripping blood pretty quickly. I tried not to get much on anything as I collected my stuff and walked back to the hangar.

I band-aided myself up and everything, but now I'm wondering what I should do for my gear. I probably screwed up by not doing anything right away, but I didn't think of it. I actually made another jump and was surprised that band-aids held up to freefall. Smile

After the second jump, everything was dry, and my rig is now packed up. Should I pop it open and use water to rinse everything as best as I can? Or is it no big deal so long as I don't mind the minor discoloration? I just don't want to do anything (or anything further) to deteriorate the strengh of lines of fabrics.

As an aside, the hand I used to grab onto another jumper during the tube left big old splotches of blood on his suit, with splatters on the legs. I apologized for it, but he said it wasn't any big deal as long as his suit didn't acquire a taste for blood. Blush

Thanks!

Justin
My Homepage


riggerrob  (D 14840)

Oct 1, 2001, 9:03 AM
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

The easiest way to remove blood is to rinse it off with lots of fresh water before it has time to dry.
After that, you may want to wash it with a mild detergent such as ERA.
But, frankly there is not much point ot worrying about blood on a main pilotchute. Chances are, the pilotchute will wear out before the acid in the blood has chance to weaken it significantly.



skymedic  (C 33561)

Oct 1, 2001, 4:52 PM
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

is blood THAT acidic though?


Premier phreezone  (D License)
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Oct 1, 2001, 5:31 PM
Post #4 of 8 (797 views)
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

Blood is actually an alkaline. It has a pH level of 7.3 to 7.5. The ideal pH is 7.461. Netural substances are at 7.0. (I guess those advanced bio and chemistry classes in high school were useful for something after all Smile
Blood is acidic on nylon. the protiens and hemoglobin in the blood react with nylon. This normally is'nt a problem since nylon is usually not under stress. The blood will cause a weak spot on the stressed nylon. Since we place our nylon under stress on every jump that weak spot can rip in no time if the blood is left on it for too long without treatment.

Check for info on how the pH level of blood is altered by different factors.

Be safe, be smooth, be fast..... and most importantly.... be phree Smile


skymedic  (C 33561)

Oct 1, 2001, 5:44 PM
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

I thought it was the decomposition of the blood that causes it to become acidic.....

Marc
Because I fly, I envy no man on earth


Premier phreezone  (D License)
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Oct 1, 2001, 5:52 PM
Post #6 of 8 (791 views)
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

Well... blood in its natural liquid state has a pH value of around 7.4. So its alkaline to begin with. Its not that is turns to an acid, but since it is not a neutral substance it will react with anything. Nylon happens to be one thing that reacts quickly to it. You can drop a piece of Nylon in a tube of blood and given enough time it will desolve. In canopies you only need to fracture or abraize part of the nylon strands in order to make them weak enough to rip when stress is applied.

Be safe, be smooth, be fast..... and most importantly.... be phree Smile


skymedic  (C 33561)

Oct 1, 2001, 6:02 PM
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

only the blood plasma has a ph of 7.35-7.45...and what you said is it is an alkaline NOT an acid. so like I said before the blood is NOT an acid even though it reacts with nylon.

Marc
Because I fly, I envy no man on earth


Premier phreezone  (D License)
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Oct 1, 2001, 8:34 PM
Post #8 of 8 (778 views)
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Re: Blood On Gear (Not Morbid) [In reply to] Can't Post

Your right, blood is not an acid. Its just corrosive on nylon and many other subastances. Any acid or akaline can erode any non pH balenced substance.

Be safe, be smooth, be fast..... and most importantly.... be phree Smile



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