Storage Conditions for Pressure Test Paper (Pressure-Sensitive Paper)

Avoid Direct Sunlight and High Temperatures

Do not store pressure-sensitive paper under direct sunlight or near heat sources.

For long-term storage, keep the paper in a cool, dark environment below 15°C.

Unused L-sheets and K-sheets should be returned to their original packaging (L-sheets in black plastic bags, K-sheets in blue plastic bags) and stored inside the packaging box.

Avoid Contact with Harmful Substances
During storage, keep pressure-sensitive paper away from the following:

Carbonless copy paper

Water, oil, solvents, or chemicals

Plastics containing plasticizers

Rubber or erasers

Oil-based ink

Storage of Developed K-Sheets

Developed K-sheets should be stored in paper bags.

When storing multiple K-sheets together, ensure that the developed surfaces do not touch each other. It is recommended to place white paper sheets between them.

Fading and Data Preservation

Developed samples may gradually fade over time.

It is recommended to scan or photograph important samples for long-term record-keeping and analysis.