I’m about to purchase a vertical foil stamping press for decorating book covers, and the overseas firm I am talking to offers two nearly identical models of press, the only difference being one is pneumatic and the other is hydraulic. They cost the same, offer the same printing pressure, etc. My concern with the hydraulic version is cleanliness. I have several other pieces of hydraulic equipment in the shop, and even if they don’t leak, they tend to weep an ever so slight amount of oil, and the way a vertical press is set up I’m imagining oil contamination on the product. The downside to the pneumatic machine would be I would have to purchase an appropriate compressor, since I don’t have any other pneumatics in my shop. Does anyone have any experience or advice for me?