Green Options

I got a surprise this month. I was writing on “green” issues related to inkjet ink, and much of what I expected to write went out the window.

In the world of offset printing, the difference between solvent-based inks and water-based inks matters—a lot. In the world of toner-based inks (digital inks), on the other hand, there really is no difference. As I’ve written here before, this is because nearly all toner-based inks are dry toner inks, which are solvent-free. Of those inks (liquid toner) that do contain solvent, it’s such a mild form that the practical difference is negligible.

But on the issue of inkjet, the issues are completely different. Solvent vs. water inks matters very little, but for completely different reasons.

An Australian scientist has developed a new method of manufacturing solar cells using nothing more than some nail polish remover, a pizza oven and a standard inkjet printer.

The iJET technique is so easy and cheap to carry out that it could revolutionize access to solar technology in the developing world.

In a recent radio interview (audio), Nicole Kuepper, a 23 year-old PhD student at the University of New South Wales, explained the process.