This article comes from WeChat’s personal WeChat account “Cool Science”, which may not be reproduced commercially without permission
I don’t know if you have been paying attention to Met Gala recently. All the fashion numbers may have commented on a round of demon styling. I just want to talk about the 3D printed skirt worn by supermodel Jourdan Dunn (after all, the other Technology doesn’t matter).
This is a petal-shaped skirt. According to the report of MIT Technology Review, this skirt is printed by stereo light curing (SLA) and weighs 30 pounds (less than 14kg) and took more than 1100 hours to make.
The following is the dismantling picture of the skirt, it looks quite cool:
(Photo source: ZAC POSEN/PROTOLABS/GE ADDITIVE)
Let’s first explain the three-dimensional light curing molding (SLA):
The easiest 3D printing we usually see is generally positive, squeezing out the melted plastic like cream, and then stacking them layer by layer, the plastic will solidify when it cools. The curing of SLA relies on a chemical reaction: under the influence of light, the photosensitive resin, which was originally in a fluid state, cross-links and becomes solid locally. The printing of SLA is carried out backwards, and a layer of solidification is pulled up a little, and finally the printing is completed.
A schematic diagram (of course this is quite simplified…)
This skirt is the work of designer Zac Posen. To customize this 3D printed skirt, you must first scan the wearer to ensure that the clothes fit. This 3D printed skirt naturally has a lot of grooves in the eyes of the crowd. For example, it is hard, it is more like armor than clothes, and it is really heavy. But these are actually okay, after all, it is more a concept display than a substitute for clothes in life.
However, the only thing that “takes more than 1100 hours” is a slot. It embodies the problem at the current stage of 3D printing: printing is too slow, especially when printing large items.
In fact, there are some technologies to speed up 3D printing. For example, I have seen a fast version of light curing technology before. The related paper was also on the cover of Science in 2015. Using this method, you can get a small model of the Eiffel Tower in 7 minutes, and it is smoother than ever.
The technicians added a “reaction suppression zone” near the transparent plate. By adding oxygen to inhibit the reaction, the curing reaction in the “inhibition zone” near the light-transmitting glass cannot occur, but curing can only occur above the inhibition zone. The advantage of this is that even if cured quickly, there is no need to worry about the cured part sticking to the light-transmitting board. The specific explanation is more complicated, and you can read the original text to learn more.
I suddenly remembered this latter thing, I don’t know if it will be used on a large scale _(:з」∠)_
3D printed skirt report source: https://www.technologyreview.com/s/613500/these-amazing-met-gala-looks-took-more-than-a-thousands-hours-of-3d-printing/
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