The strip before this one is when I started penciling in nonrepro blue pencil.  Nonrepro blue doesn’t scan if you have your scanner set to line art mode, which means you never have to erase your pencils to keep them from showing up in the scans.  This was a new glorious era for me.  Erasing was the most annoying part of what I do.  I don’t think I’ve erased something in 15  years.