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Process Uptime Tag and label printers consistently report that with UV curable ink and varnish, clean-up time and set-up time is reduced by the fact that UV curables do not dry in the press. Savings are in the range of 1 hour of clean-up and 1½ hours or more of set-up. Machine costs for a letterpress may be about $100 per hour; a 6-color press about $200 per hour; and a specialty press could bill out at as much as $1000 per hour. One-shift operations will gain a greater percent uptime than three-shift, and total job run times will affect the gain achieved with UV. Even with 24-hour operations, a screen print decorator reports 80% efficiency (uptime) using UV inks compared to 70% with conventional inks prior to his total conversion to UV. Excerpt from: Stowe, R.W., "Some Economic Factors of UV Curing;"
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