• Place a filter paper over the jar opening.
• Gently push one of the plastic rings supplied with the tray onto the jar over the top of
the filter paper to fold the paper down over the neck and rubber band. The rubber band
ensures a tight fit.
• Ensure the paper is stretched smoothly over the agar surface, with no creases or tears.
Notes:
• The lid of the tray fits over the top of the jars so that only the tops of the filter papers
are exposed.
• Screw the lid down tightly.
• Each tray has a numbered tag attached to one of the handles. This number should
match the one etched on the tray lid. Lids and trays are generally not interchangeable.