- Use a sandwich bag sealing machine (around €20 from any supermarket) and buy a roll of plastic foil (VWR, Cat No: 129-2157)
- Cut a piece of foil larger than your gel
- Lay gel between the two layers of the foil
- Seal the gel in the plastic foil ─ check no liquid leaks from edges or corners
- Do not fill the plastic foil with millilitres of water or 0.1% acetic acid ─ a few drops is sufficient to keep the gel moist in transit
- Place the sealed gel between two pieces of rigid cardboard
- Secure the gel in place within the cardboard sheets with some tape
- Take care not to stick the foil to the cardboard ─ this can lead to problems when we are unwrapping the gels
- Place the protected foil into a padded envelope
- Don’t forget to include with the package your service request form and a gel image where you indicated the bands of interst