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Don't use the refrigerator, it's not the temperature it's the humidity. Now if the temp gets over 90 it can start to clump. If you introduce the powder to the refrigerator you will draw in lots of moisture. You want to store your powder at room temperature 70-80 degrees. When you go to coat let the powder adapt to the temperature you are coating in. If you take powder out of the room that is 70 degrees and your shop is 100, let the powder sit in your shop for an hour before coating, this adapts your powder to the atmosphere in which you are working. Also you must fluidize the powder before spraying in hotter temperatures. If you let your powder fluidize a little before spraying, this will help dry it out.
I just packed my fridge in the garage with powder and noticed its probably 100% humidity in there . Storing powder in the house isn't an option, but I figure its better than letting it sit in the cabinet when its humid as heck out and 90 degrees.
I'm going to throw a couple of those dessican packets in there and see what happens.
I only have a cup gun, so fluidizing really isn't an option. I got to thinking though. Would it work to set a bag or plastic container of powder in my vibratory tumbler? I imagine thats as close to a fluidizing be as anything. I think I'll try that next time.
Dan
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I carry a gun because I'm too young to die, and too old to take an ass-whoopin'!
I'm not sure about those packets. Yes just mixing the powder up on your vibratory tumbler or mixing the powder real good will help. The moisture even though may not be visible needs to be dryed some how and air works the best, however even a good mixing as long as the bag isn't closed (sealed tight) should help.
An old freezer or a Frig. that no long works does a good job. Just rig it up so the door light stays on. Been doing that for years with welding sticks.
I just packed my fridge in the garage with powder and noticed its probably 100% humidity in there . Storing powder in the house isn't an option, but I figure its better than letting it sit in the cabinet when its humid as heck out and 90 degrees.
I'm going to throw a couple of those dessican packets in there and see what happens.
Do not use the dessicant pac because, Alone, silica gel is non-toxic, non-flammable and chemically unreactive.
However, some of the beads may be doped with a moisture indicator, such as
cobalt(II) chloride, which is toxic and may be carcinogenic. Cobalt (II) chloride is deep blue when dry (anhydrous) and pink when moist (hydrated).
- If you break a bag of silica gel by accident into the powder you will have specks and craters, big time.
What is the coldest you can keep powder? Or does it matter as long as the RH is low? Could you put a moist powder in the freezer to dry it out? Then put it in a container & let it reach room temp. I have some I left sitting out I might try that with, got nothing to loose.
I just packed my fridge in the garage with powder and noticed its probably 100% humidity in there . Storing powder in the house isn't an option, but I figure its better than letting it sit in the cabinet when its humid as heck out and 90 degrees.
I'm going to throw a couple of those dessican packets in there and see what happens.
Do not use the dessicant pac because, Alone, silica gel is non-toxic, non-flammable and chemically unreactive.
However, some of the beads may be doped with a moisture indicator, such as
cobalt(II) chloride, which is toxic and may be carcinogenic. Cobalt (II) chloride is deep blue when dry (anhydrous) and pink when moist (hydrated).
- If you break a bag of silica gel by accident into the powder you will have specks and craters, big time.
I don't think the point was to put the dessicant IN the powder, just in the powder storage device. But, since you went to all these lengths to educate us in a chemestry lesson, how about just using a maxi-pad to control the moisture? Wouldn't that do the same thing? I've used them before - in my blast cabinet
Actually at Kimberly Clark (the manufacturer) most of the worker do use them as sweat bands. I have a relative that works there and he says they work great.
Actually at Kimberly Clark (the manufacturer) most of the worker do use them as sweat bands. I have a relative that works there and he says they work great.
Grandpa,
What KC plant?
Forget that info! - we have our "Official P/C Gear" for the PBtP Get-together.........everyone must be wearing a "sweat band"
What is the coldest you can keep powder? Or does it matter as long as the RH is low? Could you put a moist powder in the freezer to dry it out? Then put it in a container & let it reach room temp. I have some I left sitting out I might try that with, got nothing to loose.
Do not put powder in the freezer....if you need to remove the moisture from the powder put it in a FLUIDIZED HOPPPER!!! Do not buy just any HOPPER! It must have the Fluidizing membrane like the one BeeBop is making! This will dry out moist powder with no side effects..
i'm thinking on the lowest setting so it doesnt get too cold and have issues when you remove it.
. Storing powder in the house isn't an option, but I figure its better than letting it sit in the cabinet when its humid as heck out and 90 degrees.
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