This instructional video demonstrates the proper technique for 'undoing' or TINKing your purl stitches so that you don't lose them and so that they sit properly on your left hand needle once you take them out.
by Greg's Kitchen
by GuineaGalaxy
by Jordan Clark
by Cool Paper Planes - [Make It
by Pins & Needles Kits
by Parade Magazine
by kalpana ambati