For this session, I used a small sauce dish and a Pluto valve. This was the largest drop size so far. The bigger drops give taller columns. I also started watching the drops when the flash fired instead of only looking at the preview screen. This allows me to see where the second (or third) drops are even if they are outside of the frame. For the translucent drops, the flashes pointed at the backdrop worked best. For the cream drops, there needs to be a little bit of light that shines on the front to prevent shadows. I also tried a 50/50 cream and water mix. I only used it in the dish for fear of clogging the dropper valve. It took 50% more time than the thickened water to reach a high peak. With the white background, I found a bit of color in the cream looked better.
I am having a little issue with my drop system. The first drops have quite different timing than the subsequent ones. That makes using two different color liquids a bit tougher. It takes a few drops to get consistent results which than changes the liquid color in the dish.
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