Moisture packs

Humidity packs are small sachets that maintain a constant relative humidity in a sealed container. They are known under brand names such as Boveda or Integra. The clever thing about them is that they work in two directions (2-way regulation) and release or absorb moisture as needed – until the target value is reached.

How humidity packs work

Inside is a saturated salt solution that aims for a fixed RH value. If the air in the container is too dry, the pack releases moisture; if it is too humid, it absorbs it. In this way, the humidity automatically adjusts to the printed value. This makes storage much more stable than relying solely on the container.

Which strength is suitable

Humidity packs are available in different strengths, usually indicated in percent RH – values around 58 or 62 percent are common. Many choose this range for storing flowers because it preserves aroma and consistency well. A pack is used up when it becomes hard and dry – then it is replaced. In combination with a hygrometer, the humidity in the jar can be conveniently checked.

Frequently asked questions about humidity packs

What does 2-way regulation mean?

The pack releases or absorbs moisture – depending on whether the air is too dry or too humid. This keeps the RH stable.

Which percentage should I choose?

For flowers, values around 58 to 62 percent are common. They keep the material supple without promoting mold.

When do I need to change a pack?

When it has become hard and stiff. Then it has released its moisture and is replaced.