Food colouring crystals (New music video added)

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Linden.g
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Food colouring crystals (New music video added)

Post by Linden.g »

Food colouring crystal formed from water imaged in DIC

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Last edited by Linden.g on Fri May 10, 2013 4:28 pm, edited 4 times in total.

pwnell
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Post by pwnell »

These are incredibly good. Care to elaborate a little more on the preparation? Sounds very interesting.

Linden.g
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Post by Linden.g »

The prep was very simple, the food colouring was placed under the cover slip and allowed to dry at room temp, crystals formed from the coverslip edges. Each colour appears to produce different crystal forms. Optics, BH-2, 40x S-plan achromat, 2.5x tube lens, DIC flash, single exposure no stacking.
Linden

pwnell
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Post by pwnell »

Thanks for the info.

Jacek
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Post by Jacek »

last beautiful

descall
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Post by descall »

Very, very nice indeed :D

TheLostVertex
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Post by TheLostVertex »

Are these crystals ever present in the food coloring solution, or do they take some time to form? You said they formed at the cover slip edge, implying that the liquid form a much different.

They appear to be quite a bit more 'spiky' than I would expect. Perhaps their shape plays a role in their ability to stick to and color things? I would be interested if this was the case, or if the crystals were a solely a byproduct of the circumstances.

Ecki
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Post by Ecki »

Amazing!

Linden.g
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Post by Linden.g »

TheLostVertex wrote:Are these crystals ever present in the food coloring solution, or do they take some time to form? You said they formed at the cover slip edge, implying that the liquid form a much different.

They appear to be quite a bit more 'spiky' than I would expect. Perhaps their shape plays a role in their ability to stick to and color things? I would be interested if this was the case, or if the crystals were a solely a byproduct of the circumstances.
Steve, the crystals grow from the edges of the cover slip inwards due to evaporation causing the solids to come out of solution in crystal form. No crystals are present in the starting mixture.

Thanks for the kind comment everyone. At this point I can not be sure that its the dyes which are causing the crystals as the product also contains propylparaben and propylene glycol. The dyes are the usual suspects, FD&C, blue 1, Red 3 etc. I need to do some more experiments to figure this out.

Linden

Linden.g
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Post by Linden.g »

Here are some more examples

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Linden

arturoag75
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Post by arturoag75 »

excellent :wink:

TheLostVertex
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Post by TheLostVertex »

Thanks for the additional information :)

Linden.g
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Post by Linden.g »

I went back to the package labelling and the yellow dye is FD&C Yellow 5 and the red dye is FD&C Red 40. The crystal morphologies appear to be very variable.

Linden.g
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Food colouring crytsal (new examples added)

Post by Linden.g »

The red colouring appears to produce stars and flat pointed sheets. The yellow colouring can make very long thin filaments as seen in the last image.

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Fredlab
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Post by Fredlab »

Hello

Really amazing
Love all the shots.
I apologise for my poor english
My blog (Macro Micro World)
My gallery

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