Primarily

In the no-other-bidders lot I got this ball of mystery yarn. I thought at first glance it might be a magic ball, but there were no joins. This was apparently a variegated or self-striping yarn dyed in black and primary rainbow colors.

I began making a granny square with it. The yarn is acrylic, and not especially soft, so that told me it was probably Red Heart and likely a Super Saver.

I did wonder if it was one of those Red Heart Super Saver All in One Granny Square yarns, as the colors are pretty classic vintage granny square. Only the color variations were all the same length instead of increasing as the All in Ones do. That solved the mystery for me.

Here's the finished granny square, with just about a yard of yarn leftover.

Aside from the roughness of the yarn, another problem it has is dye spillage, which is not uncommon with self-striping yarns. The black spills over into the primary colors and makes them look soiled, as it did here with the yellow.

I found it to be a little off-putting, frankly. Also, black is depressing, even with the rainbow colors. I can't imagine what you'd make with this that would look happy. So what brand and line is our mystery yarn?

Red Heart Super Saver Stripes in Primary Stripes. :)