[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/session.php on line 574: sizeof(): Parameter must be an array or an object that implements Countable
[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/session.php on line 630: sizeof(): Parameter must be an array or an object that implements Countable
Build Your Own SLA/SLS • Formulas for home brewed photosensitive resins. - Page 2
Page 2 of 2

Re: Formulas for home brewed photosensitive resins.

Posted: Thu Apr 09, 2015 9:05 pm
by nordin
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?

Re: Formulas for home brewed photosensitive resins.

Posted: Mon Mar 27, 2017 2:57 pm
by ezafaa
You sure! Potassium bichromate dissolve in alcohol as in my knowledge,it is insoluble in alcohol.

Re: Formulas for home brewed photosensitive resins.

Posted: Thu Dec 07, 2017 11:36 pm
by elliotm
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