Which drying method describes flattening plant material by placing it between sheets of paper and applying weights?

Which drying method describes flattening plant material by placing it between sheets of paper and applying weights?

• A. Air-drying
• B. Desiccant drying
• C. Pressing
• D. Freeze-drying

Answer: (C)

Flattening plant material between sheets of paper with weights is pressing. The idea is to remove moisture while forcing the material to stay flat, so flowers or leaves dry into a compact, two‑dimensional form. The paper wicks away moisture and the weights provide even pressure, smoothing textures and preventing curling as it dries. This method is widely used for making pressed flowers for art, bookmarks, or herbarium sheets because it preserves shape and reduces distortion. Air-drying, by contrast, dries material with air movement and little to no pressure, which can leave leaves curling or bending. Desiccant drying uses moisture-absorbing materials like silica gel to pull out water without applying pressure, so it helps keep shape but doesn’t flatten. Freeze-drying freezes the material and removes water under vacuum, a process that preserves structure but isn’t a flattening method.

Flattening plant material between sheets of paper with weights is pressing. The idea is to remove moisture while forcing the material to stay flat, so flowers or leaves dry into a compact, two‑dimensional form. The paper wicks away moisture and the weights provide even pressure, smoothing textures and preventing curling as it dries. This method is widely used for making pressed flowers for art, bookmarks, or herbarium sheets because it preserves shape and reduces distortion.

Air-drying, by contrast, dries material with air movement and little to no pressure, which can leave leaves curling or bending. Desiccant drying uses moisture-absorbing materials like silica gel to pull out water without applying pressure, so it helps keep shape but doesn’t flatten. Freeze-drying freezes the material and removes water under vacuum, a process that preserves structure but isn’t a flattening method.