Tripropylene glycol monomethyl ether (TPM) is a non-flammable*, low odor solvent that can be used to clean and dissolve uncured resin on stereolithography (SLA) 3D printed parts. TPM has a lower evaporation rate than IPA and washes about three times as many parts as IPA before needing to be replaced.
TPM is not currently certified for use with Formlabs biocompatible resins.
Formlabs generally recommends using isopropyl alcohol (IPA) with a concentration of at least 90% to wash parts. If you are unable to use IPA, TPM is a tested alternative.
*This product is not labeled as dangerous according to Regulation (EC) No. 1272/2008.
To handle TPM safely:
Cleaning a TPM spill:
Spilled TPM does not present an immediate fire or health hazard, but it does leave an oily residue that can be slippery. TPM evaporates very slowly, so the spill won’t dry by itself.
To clean a TPM spill:
Recycling or disposing of used TPM:
Over time, TPM accumulates dissolved liquid resin, which reduces its efficacy. For best surface quality, replace TPM when it no longer fully cleans parts or its specific gravity rises above 1.000.
To safely dispose of contaminated TPM:
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