One of the famous fast food networks. According to the standard, production premises are divided into zones, conditionally "blue" and "green", which can be washed only by inventory of the corresponding color and not otherwise. Of course, everyone as usual, but completeness must be observed. However, the swabs inevitably break before new "standards" will be ordered, but who cares about it - it must be, and it's all here.

Here is the oil picture. It is worth the usual wooden swab, on which the blue mark is written "GREEN".