Formulas for home brewed photosensitive resins.

You can discuss Photo-sensitive resins, polymers, and oligomers.
nordin
Posts: 1
Joined: Thu Apr 09, 2015 8:57 pm

Re: Formulas for home brewed photosensitive resins.

Postby nordin » Thu Apr 09, 2015 9:05 pm

We are making our own resins with specific properties for microfluidic devices and are using an Asiga 3D printer with a UV LED at 385 nm. We have not been able to find a good UV absorber for this wavelength. Sudan I is ok for testing purposes, but our final parts can't be colored. Absorbers like Mayzo UV 236 and UV 327 or BLS-99 cut off in their absorption at about 385 nm so they aren't absorptive enough. I just looked at the specs for the absorber in the Ember open source resin, Mayzo Benetex OB, but it turns out to be fluorescent, which is also something we can't have. Does anyone have suggestions for an alternate absorber that works well at 385 nm?

ezafaa
Posts: 1
Joined: Sat Mar 25, 2017 8:05 pm

Re: Formulas for home brewed photosensitive resins.

Postby ezafaa » Mon Mar 27, 2017 2:57 pm

You sure! Potassium bichromate dissolve in alcohol as in my knowledge,it is insoluble in alcohol.

elliotm
Posts: 4
Joined: Mon Dec 21, 2015 9:21 pm

Re: Formulas for home brewed photosensitive resins.

Postby elliotm » Thu Dec 07, 2017 11:36 pm

Greg-
I don't know if you are still working on this project, but I would question if the florescence stays in the final state, or can it be bleached out? I think some of the brighteners added to the resin result in that bluish tint when not completely cured.

-Elliot