Use this stuff to slow down the drying time of printing ink. Why would I
want that, you ask? Because if the inks dry in your screens while you are
off getting a sandwich you will be terribly wroth. So, use this and that
won't happen! If it does, and you are terribly wroth, please see Speedball
Speed Clean for help in getting that screen clean. Beware, Speed Clean
removes pretty much everything from your screen (i.e. screen filler,
photo emulsion, etc.).
So, to recap: don't be wroth because printing inks dried in your screen
whilst you were eating a sandwich; rather, use Speedball Retarder Base to
slow the drying time of printing ink.