IPA vs TPM

We have now received the Form4L as an addition to our existing Form 4 setup. The Wash requires quite a lot of IPA, and up to now we’ve always used 70% IPA in the smaller station. How good is TPM in comparison, and how often does it need to be replaced? We mainly print with ESD Resin, and occasionally with Grey and Tough

Hi @KuemmeMl,
We have a support article about washing with TPU that gives a good overview of the workflow and difference in results. The article does not mention ESD Resin, but according to the experiences of our internal print farm team, TPM is not ideal for this material - they suggest Formlabs Resin Washing Solution, if using IPA is a concern.
Hope this helps!

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I still use the Wash that came with the Form3 as it’s, generally, large enough to contain parts. If not, I wash the parts twice with an end-over-end flip after the 1st cycle. As for using a lot of IPA, I highly recommend buying a Vevor alcohol still off Amazon. All sizes available up to 13 gallons. Mine is 3 gals and yields about 80-83% reusable, clean IPA in about 3 hours of running. Well worth the minor expense for the system and induction heating plate. If you have an option when buying the still get one with a submersible pump … you’ll need that in a 5-gallon bucket of cold water to condense vapor into an empty gallon jug.