Slides should be treated with the same care you would give to valuable negatives. The four areas of most concern are fingerprints, scratches, dust and light. Always handle slides from the mount, and wear anti-static gloves to protect against dust and static particles. Do not place slides on a tabletop or desk where they can easily get scratched. Do not leave slides on a light box any longer than necessary, as extended exposure to light can cause fading. The same is true for the amount of time in a projector. Store slides vertically, not stacked and banded. Keep your slide collection in a closed storage box or cabinet when not in use to protect against dust and light. If your collection is valuable, duplicates should be made for viewing and projection, leaving the originals safely stored.