Re: Dissolving SL Resin?

From: Blasch, Larry (
Date: Mon Jan 27 2003 - 20:00:17 EET

At 08:48 PM 1/23/2003 -0500, Rob Connelly wrote:
        Hello RP'ers,
        I have a resin question for the group. I have a customer who wants
to make some tiny little parts on a high-res SL machine for a medical
application. Trouble is, he needs the parts for a process similar to
investment casting wherein he will shell them with something, and then
dissolve the SL part back out of the shell. He can't use high temperatures
as in investment casting -- he needs to use a solvent.
        So, is anyone aware of a resin that can be used in a high-res SL
machine (either a Viper or a 250HR) that can dissolve in acetone, xylene,
MEK, or other such nasty chemical? Do the old acrylates dissolve? My
customer has told me that just softening or deteriorating is not good enough
-- it has to dissolve. If this does exist, do you know of a vendor who has
this combination to whom I can outsource the job?
        Thanks in advance for your time,
        Rob Connelly
        FineLine Prototyping, Inc.
        6300 Limousine DR
        Suite 130
        Raleigh, NC 27613
        919-781-7702 <>


How about trying the zcorp machine with powdered sugar? Or pure corn starch.

I can't think of anything else that would dissolve out well enough to work.

Might be a problem with resolution if the parts are that small.

You might be able to pull a silicone mold off of the SLA part and mold
something soluble into that as an alternative. (Melted sugar perhaps?)

Sweet problem,


PS: I must have sugar on the brain today.

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