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I have stuck resin print that won't detach from the bed of my Creality LD-002R LCD Printer. I guess I could break the print off piece by piece, but it won't budge with pressure, pulling with all my strength, or even hitting it pretty hard.

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    $\begingroup$ Being wary of getting any resin anywhere you don't want it, can you put the bed+print in a fridge for an hour or so? $\endgroup$ Aug 14 '20 at 13:59
  • $\begingroup$ Very carefully :D $\endgroup$
    – user77232
    Aug 14 '20 at 19:58
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    $\begingroup$ The freezer did it, but the thermal shock broke the print (and I still needed a spatula!). Perhaps the fridge is indeed the way to go... trying that with the second round. $\endgroup$
    – 0xF2
    Aug 14 '20 at 21:03
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    $\begingroup$ Nomenclature ERror: it's an LCD printer. not an LED $\endgroup$
    – Trish
    Aug 15 '20 at 10:11
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There are generally 3 ways, in order of least to most desirable, and at times you need to combine them in an escalation:

  • Toss the vat. This is the most expensive and generally should only be the last resort, for example, if you damage your film.
  • Careful Brute Force. This can damage the film, but carefully getting a wedge between the film and the print might be the only option to remove the last bits sticking to the film. If you have to resort to this, take your time.
  • Using thermal expansion. We all know that materials expand when you heat them. The reverse is also true: materials shrink if you cool them. Different materials shrink differently. So by cooling the vat with as little liquid resin and the print inside can lead to the print 'popping' free, just like in an FDM printer. Note however that this might not work on its own in case you made a suction cup (then you need to resort to brute force or drill a hole into the top), and you should take extreme caution not to contaminate any food with resin, as the stuff is not safe for consumption at all. With the right setup, you might be able to heat the build plate carefully while the print itself is kept cool.
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  • $\begingroup$ The freezer works, and I have a plastic box I use to avoid food contamination, courtesy of my better half. I am going to try compressed air next, as a way to bring thermal expansion. $\endgroup$
    – 0xF2
    Aug 15 '20 at 17:04
  • $\begingroup$ actually you'd use cooling-contraction :) $\endgroup$
    – Trish
    Aug 15 '20 at 20:18
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    $\begingroup$ I found another convenient approach: while rinsing the print to remove residual resin, I wash the print with cold water, and immerse it in the same in a takeout-food box dedicated to the purpose. I then rinse the printing plate with really hot water. The difference loosens the print enough to make its removal much easier. $\endgroup$
    – 0xF2
    Nov 21 '20 at 10:01
  • $\begingroup$ @0xF2 oh my! That's thermal shock too, but different direction! $\endgroup$
    – Trish
    Nov 21 '20 at 10:30
  • $\begingroup$ I don’t think compressed air is going to change the temperature of your part, unless you know different. Do you expect the temperature to go up or down? $\endgroup$
    – Frog
    Nov 29 '20 at 3:33

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