encipher
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Delayed 'Delivery'
Hi,
Anyone ever buy those capsules that you toss in your bathtub, dissolve, and deliver bath oils into the water. Well, I'm looking to make a similar
thing, I want to have a salt (granular), or concentrated solution of the salt in one of those capsules, and have a delayed delivery into the water as
the capsule or bead dissolves.
Does anyone have experience with these, or any idea on where to start with making them?
Thanks
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ssdd
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Could you perhaps use a gelatin type thing where you mix the salt with the gelatin then pour it into a mold?
Not sure how well that would work, but I know it would dissolve in hot water slowly, also not sure how high a concentration of salt you could get into
it, I have gotten pretty high concentrations of sugar in the past. What the exact ratios were I couldn't tell you.
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roamingnome
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http://www.aveka.com/aveka_beads.htm
i got free samples from a company simmilar to this for a skateboard wax invention
its easier to put nonpolar oils inside capsules
its seems in your case the capsule size would need to be larger.
the last time i used gelitan it dried too slowly and formed crust every where.
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encipher
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yeah, I'm looking for a much larger size. About the size of a AAA battery. Any ideas?
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roamingnome
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http://www.spicediscounters.com/gelcap000.jpg
http://www.kalyx.com/store/images/capa.jpg
000 triple zero is the largest they make....
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not_important
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The usual way solids are package for bath use, or for other delayed release, is to compress the solids into pellets; possibly adding small amounts of
starch or other soft material that will dissolve or disperse in water. Sometimes the pellets or tablets then get a thin coating of a agent to slow
the initial contact with water.
Materials which can be used to slow down solution in water, or to form a slowly dissolving film, include polyvinyl alcohol (PVA), polyethylene oxide
(PEG - long chain polywthylene glycol), agar, alginic acid, carrageenan, and the gums xanthan, locus bean, guar, arabic, gellan, and carboxymethyl
cellulose (CMC). Some of these interact with polyvalent ions, and so might not be suitable for you application. Some can be made up in hot
solutions, possibly with alcohol, that rapidly thicken as it cools, this would allow dipping or tumbling to form a surface film.
As these are complex substances or mixtures, getting the right variant isn't always easy, especially for individuals. Fabricating containers, such as
those gelcaps, isn't simple either.
You might be able to find PVA in the form of small bags; or tubing of the right diameter, PVA is a thermoplastic, you can heat seal tubing to form
small packets - seal one end, add powder, seal above that to finish one and start the next pouch, cut them apart when done.
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