We’re all familiar with the problems surrounding ink cartridges: they’re expensive, bad for the environment and just when you want to print that important document, your cartridge runs out of ink.
With the method of Inkless, the paper is carbonized. If you would normally try this with thin material, such as paper, you would burn through it quickly. The resulting print would also not be permanent in that case and would not be black enough. Inkless has a much better control over the carbonization process, which means we don’t have to print as deep and therefore do not damage the paper. Furthermore, we have developed a solution which ensures that the print is black enough and also permanent. The technology is protected by several patents.
Source: inkless.inkAdded: 9 November 2016