Search found 82 matches

by Hugues
Sat Apr 04, 2015 10:55 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 204396

Re: Carbon 3D

Would oxygen migrate all the way to the center of the vat from the openings on the sides ?
by Hugues
Sat Apr 04, 2015 7:11 am
Forum: General
Topic: Super Fast ‘Membrane Based’ 3D
Replies: 30
Views: 24787

Re: Super Fast ‘Membrane Based’ 3D

To try But it's the total UV radiation that generates the cloudiness. So if you manage to print faster because less up and down motion, the total exposure time of your part should not change dramatically, so the total UV that your PDMS sees is about the same, I think. Edit: not sure anymore what i'm...
by Hugues
Sat Apr 04, 2015 3:48 am
Forum: General
Topic: Super Fast ‘Membrane Based’ 3D
Replies: 30
Views: 24787

Re: Super Fast ‘Membrane Based’ 3D

Sid, where did you get the connection with the titanium dioxide ? Maybe it has potential.

Re: PDMS, the Titan1 I'm using has a PDMS base with a FEP film on top. People have tried printing on PDMS directly, it works but become cloudy quickly.
by Hugues
Thu Apr 02, 2015 3:25 pm
Forum: General
Topic: Super Fast ‘Membrane Based’ 3D
Replies: 30
Views: 24787

Re: Super Fast ‘Membrane Based’ 3D

i'll be talking completely out of my ass here: photosensitive resins contain HO groups normally (I think) TiO2 film when exposed to UV can carry hydrolysis If it can carry hydrolysis then it might be able to break these HO bounds Oxygen is freed up and inhibits curing = magic dead zone voilà patent ...
by Hugues
Thu Apr 02, 2015 2:56 pm
Forum: General
Topic: Super Fast ‘Membrane Based’ 3D
Replies: 30
Views: 24787

Re: Super Fast ‘Membrane Based’ 3D

i am no way a chemist, but maybe a hint here about titanium dioxide ? from: http://en.wikipedia.org/wiki/Titanium_dioxide#Photocatalyst Titanium dioxide, particularly in the anatase form, is a photocatalyst under ultraviolet (UV) light. .... Titanium dioxide, in thin film and nanoparticle form has p...
by Hugues
Thu Apr 02, 2015 2:20 pm
Forum: General
Topic: Super Fast ‘Membrane Based’ 3D
Replies: 30
Views: 24787

Re: Super Fast ‘Membrane Based’ 3D

Sid, i don't follow, these 2 articles are related or what ?
by Hugues
Thu Apr 02, 2015 1:54 pm
Forum: General
Topic: Super Fast ‘Membrane Based’ 3D
Replies: 30
Views: 24787

Re: Super Fast ‘Membrane Based’ 3D

cool,
but without a hint about the magic membrane he's using.
by Hugues
Fri Mar 27, 2015 2:55 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 204396

Re: Carbon 3D

i'm in for a group buy,
let's not piss the supplier off with many people contacting them for the same questions and small qties,
by Hugues
Sat Mar 21, 2015 5:00 pm
Forum: Resins
Topic: Why NOT use saltwater?
Replies: 10
Views: 11930

Re: Why NOT use saltwater?

I have a Titan 1 also,

Seems it was tested, please read this post with some links,
viewtopic.php?f=13&t=2767

Maybe you should try with glycerin

If we can crack this problem, it would be so great ,
by Hugues
Fri Mar 20, 2015 3:00 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 204396

Re: Carbon 3D

Well tell them to focus their projectors at just below the surface and they can get this CLIP effect for free. ;) .... Do you mean by this the resin cures only on the focus plane ? and not above and below ? The resin above and below focus plane still receives UV photons even though the image is not...