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0 pointsjonnycowboy11y ago0 comments

Correction - the oxygen permeable surface is Teflon AF 2400 which is available commerically: http://www.randomtechnologies.com/ The spacer (initial seperation between window and glass build plate) which determines resin thickness is 8 mil (200 um) aluminium shim stock. The projector looks like a UV projector: http://www.ti.com/devnet/docs/catalog/thirdpartydevtoolfolde...

That should be enough to get anybody started!

Too bad the Telfon for a 10"x10" bed, 100 um thick would be 750$ (10 grams at 72,000$/kg).

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spyder11y ago

You forgot the resin, which is probably isn't just a regular UV-activated resin but could be their own patented mixture to achieve the accurate curing time they need. That's the harder part to DIY but I guess it's not impossible and there will be similar products soon.

jamessb11y ago

The precise composition of the resin isn't specified, but the online material and methods state:

The ramp test patterns in Fig. 1C were printed with trimethylolpropane triacrylate (TMPTA) using the photoinitiator, diphenyl(2,4,6-trimethyl-benzoyl)phosphine oxide. Other objects were printed with a combination of monomers from Sartomer (CN2920 & CN981), TMPTA, and reactive diluents such as n-vinylpyrrolidone, isobornyl acrylate, and cyclohexane dimethanol di-vinyl ether. We also utilized the photoinitiators, phenylbis(2,4,6-trimethyl-benzoyl)phosphine oxide, 1-hydroxycyclohexyl phenyl ketone, and 2-benzyl-2-(dimethylamino)4morpholinobutyrophenone along with an assortment of dyes from Wikoff and Mayzo.

http://www.sciencemag.org/content/suppl/2015/03/16/science.a...

54245811y ago

Well, a 10"x10" bed might be unreasonably expensive for now, but a 3" by 3" SLA printer like this has lots of potential applications, and would only cost around $75 for the Teflon AF 2400 (using your numbers).

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