teodor
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My dessicator lid is shifting
I have some annoying problem with dessicators - the lid is shifting over time opening the dessicator. I though something wrong with my one or two old
dessicators but it just happened with a new one (the 3rd) again. I use a vacuum grease "Korasilon-Paste", also there could be some vibration on a
table but I remember it happened without any vibration also. How it could be fixed? Different grease? Clips?
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Keras
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I’m surprised. Mine is so tightly held I need really to push very hard to open it.
Are you sure you don’t put TOO much grease?
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teodor
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I put as much as to remove air bubbles, but yes, I can shift it with average force. I am not sure it is safe to apply much force to a lid, it can jump
suddenly.
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BromicAcid
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You could try a wrap of electrical tape or silicone tape around the outer edge, that should hold it in place.
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teodor
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Thank you. Actually it is what I do. But I was thinking it was a defect of my dessicator. Now I am thinking it could depend on a grease.
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Fery
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I use Ramsay grease and if I let it to sit unused for 1 year it is quite hard to open it.
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Keras
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Quote: Originally posted by teodor  | | I put as much as to remove air bubbles, but yes, I can shift it with average force. I am not sure it is safe to apply much force to a lid, it can jump
suddenly. |
Air bubbles? I put a very very tiny amount of grease, just in order for the seal to look transparent (and not frosted). Generally I smear the grease
by rotating the lid.
It’s usually very difficult to open the lid after a few hours under vacuum, which I interpret as a very tight seal.
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teodor
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| Quote: Originally posted by Keras | | Quote: Originally posted by teodor | | I put as much as to remove air bubbles, but yes, I can shift it with average force. I am not sure it is safe to apply much force to a lid, it can jump
suddenly. |
Air bubbles? I put a very very tiny amount of grease, just in order for the seal to look transparent (and not frosted). Generally I smear the grease
by rotating the lid.
It’s usually very difficult to open the lid after a few hours under vacuum, which I interpret as a very tight seal. |
The grease I use is very soft so even after several months the lid is shifted with the same force. I conclude this is the difference and the reason
for my travelling lids. The suggestion of BromicAcid works for me. I think I would prefer to put the tape than to have a pain of opening frozen lids.
But I will do experiment with other type of grease also.
The back side of a soft grease - it always pulled inside a bit under vacuum and make necessarily to cover all compounds inside from its drops.
[Edited on 11-9-2025 by teodor]
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bnull
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What about a ring? There are those wooden rings for embroidery; you may find one that suits the desiccator; you'd have to add small tabs on the upper
part so it doesn't slip down. Or you could cut off a disc from the plastic lid of a bucket or bin and fit the remainder on the lid.
Or you could use a drum locking clamp, like the one below. There must be one the size you need.
[Edited on 11-9-2025 by bnull]
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teodor
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| Quote: Originally posted by bnull | What about a ring? There are those wooden rings for embroidery; you may find one that suits the desiccator; you'd have to add small tabs on the upper
part so it doesn't slip down. Or you could cut off a disc from the plastic lid of a bucket or bin and fit the remainder on the lid.
Or you could use a drum locking clamp, like the one below. There must be one the size you need.
[Edited on 11-9-2025 by bnull] |
Hm. Interesting.
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chempyre235
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| Quote: Originally posted by bnull | What about a ring? There are those wooden rings for embroidery; you may find one that suits the desiccator; you'd have to add small tabs on the upper
part so it doesn't slip down. Or you could cut off a disc from the plastic lid of a bucket or bin and fit the remainder on the lid.
Or you could use a drum locking clamp, like the one below. There must be one the size you need. |
That's a fine idea. I might consider one of those for my desiccator.
"However beautiful the strategy, you should occasionally look at the results." -Winston Churchill
"I weep at the sight of flaming acetic anhydride." -@Madscientist
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