Perfect Loop

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Using this PERFECT LOOP, you can place your thin sections, cut on the ultramicrotome, easily on the grid mesh without creases.

The Perfect Loop allows you to pick up sections consistently without causing any damage to the sections. It is the only loop that is currently available where the outside diameter of the loop is the same as the grid and the inside diameter is slightly larger than the observation area of the electron microscope. The thickness is about 40 microns. Due to the fact that the loop and the grid are of the same diameter they are attracted to one another when in water and attach together through the surface tension of the water. Even if the section touches the inside of the grid during blotting the touching area is minor and, therefore, the section is not damaged. When the grid is removed from the loop the section remains in place without fail. The area equals the observation field (about 2mm diameter) of the electron microscope; thus pieces can be fully observed.


1. Center the loop
above the sections
2. Slowly lower
the loop over the
sections and touch
the water
3. Gently lift up the
loop with the sections
in a droplet of water
4. Lower the loop
onto a grid and lift
up again
5. The grid holds
to the loop by
surface tension
6. Lower the loop
to the filter paper
to remove water
7. For coated grids,
touch with filter paper
to remove water
8. Separate the grid
from the loop with
an eyelash

Additional information


set, each, 5/each


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