They are manufactured in a clean room environment and individually checked for minor imperfections. Trays are then surface treated to increase wettability so solutions spread and mix evenly across the wells. Samples of treated trays are checked for proper wettability by microscope inspection of wells after the addition of fetal calf serum. To ensure the trays you receive perform satisfactorily for a minimum of one year from the date of receipt, samples of each lot are stored and periodically tested for wettability. Finally, trays with attached lids are packaged in gas impermeable bags in stacks of ten and boxed ten stacks per case.
Trays are available standard packaging or radiation sterilized.
Robbins also offers a unique stackable version of the 60 and 72 low profile trays. These trays are designed to nest within each other when used without lids. This feature reduces handling and simplifies preparing and storing trays. Ready to use from the package, trays and lids are packaged separately. The well dimensions on all types of Robbins trays allow visualization of the entire bottom surface area under 100 x magnification.