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post #111 of 115 (permalink) Old 07-17-2019, 08:53 AM
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I don`t know if this is going to work or not but it is a case of nothing lost if it doesn`t. I grabbed an old can of paint to use and it had skinned over. While using it I thought of the Stop Loss bags I bought from Lee Valley that are for storing partial cans of paint in. You fill them then squeeze the air out and seal them. Problem is they cost about $5 each. Then it dawned on me that maybe a zip lock bag might do the same thing for pennies. So I had my wife hold the zip lock bag with a filter in it`s opening and I poured the paint in and sealed all but a corner. Then I squeezed all the air out and finished sealing it. I`m going to store the bag in an empty coffee container to protect it. It`ll take time to see if this works but it`s worth a try.
I was wondering if anyone had ever tried using welding shielding gas co2 argon mix to help store paint. I have been thinking about this for a while now. I always have welding gas in the shop. I may give it a try the next time I have a paint can open. Maybe put the can in and fill the bag with the gas. Any thoughts on the subject.
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post #112 of 115 (permalink) Old 07-17-2019, 12:51 PM
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I keep a little Rusoleum around, mainly for metal, but it is something I reach for when I have something small to paint. Good stuff, so long as you don't over spray.

The more I do, the less I accomplish.
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post #113 of 115 (permalink) Old 07-17-2019, 01:45 PM
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I was wondering if anyone had ever tried using welding shielding gas co2 argon mix to help store paint. I have been thinking about this for a while now. I always have welding gas in the shop. I may give it a try the next time I have a paint can open. Maybe put the can in and fill the bag with the gas. Any thoughts on the subject.
Lee Valley used to sell spray cans of something along that line Roxanne (at about $13-14). I can`t remember what the ad description said it was anymore and I don`t think they still carry it. It has to be heavier than air so that it both stays in the can until you get the lid on and displaces any oxygen in the can up towards the lid away from the surface of the paint. I see argon`s atomic number is 18 which puts it heavier than air at about 14.7 (primarily oxygen at 16 and nitrogen at 14) and so is the CO2 so it should fit the bill. Definitely worth a try.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #114 of 115 (permalink) Old 07-19-2019, 09:24 AM
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Here is a product that Rockler sells called Bloxygen.

https://www.rockler.com/bloxygen-gas...MaAqQQEALw_wcB
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post #115 of 115 (permalink) Old 07-19-2019, 09:42 AM
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Here is a product that Rockler sells called Bloxygen.

https://www.rockler.com/bloxygen-gas...MaAqQQEALw_wcB
I see it is canned argon. Argon is totally inert. It won`t react with any other element. I guess the question of whether welding gas will work is whether the paint is capable over time of stripping some of the oxygen atoms away from the CO2 that is in it. Since the molar mass of argon is about 40 and CO2 is about 48 the CO2 is what is going to sit on top of the paint layer. I would still think that has to be better than just straight air.

Looking that info up I found that argon is the 3rd most common component in our atmosphere. There`s more of it than there is water vapour and 23 more times of it than CO2.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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