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How Do They Do This?
I have seen a few products in the market that were stylishly bottled, but how do they do it?
Here is an example (click LINK). -
6 Replies
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Do what in particular?
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Think he is referring to the product in the container and the way it has been filled. Like chromosomal helix.
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I was somewhat involved with the very first product like this, so I’m not just guessing.
The trick is, it’s not filled all at once, it’s a multi-step operation, but it’s a relatively simple modification of an existing process.First, the jar is filled with your clear gel, and possibly allowed to set up for a bit. Then the jar is moved to another machine, which inserts filling nozzles all the way into the bottom of the jar. In this particular case, the two nozzle openings are rectangular, to produce a ribbon-shaped extrusion. Then, right as the nozzles start pumping the fluid to be extruded, the nozzles are slowly retracted upwards, to form the ribbon-shaped extrusion. Simultaneously, the jar is slowly rotated, which puts the twist in the ribbon.The formulating problems for this kind of product are interesting. If the ribbon material is too similar to the surrounding clear gel, the color(s) will migrate over time, and the ribbon will start to look fuzzy, or dissipate completely. But, if the ribbon is too dissimilar, it will not blend well and/or yield an elegant skin feel during application. It can produce unique results, as well. Sometimes, the best feeling emulsions are the least stable. In this case, there is the opportunity to form that unstable, great feeling emulsion only upon application. -
@Bobzchemist, Thanks.
@Belassi, yes (as @milliachemist noted) I was referring to the product in the container, I’m sorry for my poor description.I thought as much that there was a two-step process, so much so that I bought a cake-making tool to try the insertion process, just that I have not been bold enough to try it
But, I think your explanation as to the instability of the product is a very good insight for me as well. However, I think I have an idea of what to do to combat that if I am to undertake the project.
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As an engineer I can imagine designing a coaxial nozzle, so that the active in the ribbon would be protected from the clear by a very thin film, such as we see in these encapsulated actives one finds in shampoos.
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It’s easier to make a prototype if you use a syringe with a large-diameter needle. Either a rotating platform or a skillfull assistant is required to turn the jar as the second material is being extruded.
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