When using this double folding grid support film, apply or disperse drops of the sample onto the film surface. Fold the double grids in half, then fold and press the ear handle tightly to create a sandwich structure between two layers. This setup is ideal for observing large particles, samples with poor adhesion, or those prone to drifting after electron beam bombardment. It is particularly suitable for magnetic material samples that must be observed under TEM, preventing movement and contamination.