[Cheese Man]

I wash it in .5M HCl, works pretty well.

The I-variant patches can handle 3.2M, so I use that.

Experiment yourself though, depending on the purity of your solution it can get really nasty really fast.

 

[Cheese Man]

HCL

Hydrochloric Acid.

I mean soaking in it for about 10 sec. Then you have to soak it in NaOH (I use ~.5M again) for a little while, about 3 sec is good enough. Then, DO NOT USE CA on it for at least a few hours, CA reacts violently with the remnants of HCl on the patch (just a teeny bit keeps the bb crap off of it) and it will eat your patch.

 

[Cheese Man]

Maybe less, you have to experiment for yourself. It depends on the size of the patch and the purity of your HCl. Drop it directly from the HCl into the NaOH, and then dry it off.

You can buy HCl granules, you would just mix them with water to mix up the liquid. Do some research into molarity and mixing solutions - this can go horribly wrong if you screw it up.

 

[Cheese Man]

What? It's not illegal to have acids in your home, what do you think bleach is?

 

[Cheese Man]

Well, .5M is not too bad. Just don't use the 3M stuff, or anything over about .7M and you should be fine.

 

[Cheese Man]

It is great, but very dangerous. Like eat flesh from your hands dangerous.

.5 is fine to have on your hands for a few minutes, then it starts to burn a little bit.

 

[Cheese Man]

IDK. I think it is .32M

You don't want to buy pre-made stuff.

 

[Cheese Man]

Everything is on Sigma Aldritch, though I think you might have to be an institution to buy from them.

On second thought, maybe this isn't the best plan for you.

 

[Cheese Man]

Exactly.

I was always a fan of warm, soapy water.

 

[Cheese Man]

Yup. Sorry man, if you can get it to work, kudos, but it's gotta be done right.

If you boil it - that works a little better.

 

[Cheese Man]

Cold water doesn't get grease off, which is why it needs to be at least lukewarm.

 

[Cheese Man]

No problem. At least I wasn't a total loss.

 

[Cheese Man]

What molarity? I have had some 10M stuff sitting around for years and it's fine...

 

[Cheese Man]

I'm touched by the amount of trust you have in me...:cheers:

Generally it won't melt glass, and you can treat metal containers to hold it. Generally they use a special plastic designed to not react with HCl.

 

[Cheese Man]

I'm a high school student.

I just do a crap ton of stuff that involves advanced chemistry/physics that my teacher might not let me do at school (kinda dangerous...).