We have been through a really hard time, but we finally made it! The color options will be the same for both pens! And we are working on the transparent ink also, hope it won't a problem before we make the delivery.
The battery life depends on the modes you choose. If you choose the light mode, the battery life is approximately 4-5 hours. If you choose the light & ink mode, the battery life is about 1.5 hours. And the stand-by time can reach 3-5 days.
As the traditional light-curing material, UV light-curing inks are variable and easy to be developed. This October, blue LED was awarded Nobel prize and our R&D members were greatly inspired by its potential value.
In nearly two-month tests on blue light sources, we were trying to equip the blue LED with more options in its ink colors and functions, such as the flexible ink. So technically speaking, our R&D members think that blue light has more chances than UV light in the future.
By the way, our R&D members are big fans of emerging technologies. They are always crazy for it and trying to apply these new techs to create some fancy gadgets.
We are still testing tips of different diameters, ranging from 0.7-3 mm, and we are gonna post recent updates if we have exact data once we finish the test. Each package will come with (at least) two different tips for users to choose,and with one cartridges, you can print 12-25 meters, depending on your tip model and outflow speed.
Don't see the answer to your question? Ask the project creator directly.