Sine Wave Screentone

So.

I finally took a good look at a certain screentone and realized it was a sine wave.

Lots of sine waves.

In 45° Increments.

There is also a gradient component that I have not quite matched yet. but this is interesting enough.

I'm trying to figure out how to post it too. This is a 600dpi 1-bit PNG - When you hit download, of course. It should be suitable for print - It will be interesting to see how dA does the preview.