Huh. Two different materials that cure with different light wavelengths. That’s an interesting idea. Definitely seems like there’d be some interesting challenges there. For one, a whole new product line of resins would need to be created that cure at the other wavelength, so that you could mix them to get the combo of materials you want.
Like Pankl mentioned, it may also be difficult to selectively cure one resin when the other resin is physically in the way, leading to a mix of cured and uncured resins: Maybe that could be solved by formulating a single resin to develop different properties depending on the wavelength of light that is used to cure it? Or maybe that’s what you get from your mix of resins that cure at different wavelengths? Maybe each resin is optimized to fully cure at a specific wavelength, but a nearby wavelength will still cure it but not optimally. Then, both resins would contribute to the cured material properties, but the wavelength of light would control which one is more cured and therefore has a greater impact on the cured properties? I’m sure there’s many different ways it could be done, each with their own challenges. If they could figure it out that would be pretty amazing!
In the meantime, I’m hoping for a simple software option that would enable existing technology and resins to do limited multi-material prints. Adding an option to pause the print after a specified layer, and then continue with the print settings for another material seems to me like it should work. Maybe include some kind of rinsing procedure to perform between materials.