For almost thirty years, Print File has manufactured negative preservers from polyethylene, an archival material proven safe for maximum long-term storage. We use polyethylene since the alternative polypropylene, creates a greater static charge, which consequently attracts more dirt and dust to the negative. In addition, dust and scratches are more noticeable on enlarged negatives; therefore, it is imperative that the conditions to reduce dust and scratches be controlled as much as possible. We optimize these conditions by manufacturing our negative preservers from polyethylene.