It won't get very hot, it only gets slightly warm. And you can make a
perfectly good splice with it even if it's not warm, it just takes a lot
longer to set.
Roberts and Sharples "A Primer For Filmmaking" has a good set of pictures
on how to use the M-H. These are the keys: first of all it doesn't work on
estar film, secondly you need to make sure you have the film lined up properly
base-to-emulsion and that you are scraping the emulsion side and not the
base side. Scrape it well. If you don't see emulsion coming off, the scraper
may be adjusted too high. Use fresh cement.
Make sure the thing is immaculately clean, too. Use acetone to remove any
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