Additional Pigment needed for FTD Deep Black?

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JosephOsborn
Posts: 38
Joined: Sat Jan 17, 2015 9:33 pm

Additional Pigment needed for FTD Deep Black?

Postby JosephOsborn » Thu Oct 29, 2015 9:54 pm

I thought I'd solicit some feedback here before I add pigment to my FTD Deep Black.

Deep Black is great-- it cures quickly and has good physical properties. It renders details very well. BUT, I am getting horrendous bleed and overcure in the z dimension. At 30 and 50 micron slices, any surface that faces away from the projector has muddy detail and poor surface, rendering the object unusable. It gets a little better at 70 microns, but I need the higher resolution. Exposure-wise, I am right on the lower limit to achieve a stable cure and successful prints. For 30-micron slices, I am curing at 1.8 to 1.9 seconds (50 microns XY).

Is anyone else seeing this problem with Deep Black? If so, have you found that adding additional pigment reduces or eliminates the overcuring?

Thanks for any feedback.
Last edited by JosephOsborn on Thu Nov 05, 2015 1:34 am, edited 1 time in total.

Kvirre
Posts: 139
Joined: Tue Jun 24, 2014 8:14 am

Re: Additional Pigment needed for FTD Deep Black?

Postby Kvirre » Fri Oct 30, 2015 4:58 am

I have no problem .... sry but the bleeding problems I got previously was substantially worse on other resins I tried.
FTD Deep Black is the best I tried in terms of bleeding.

But then again I don't do 50 micron xy with cures as short as you do.

redonix76
Posts: 36
Joined: Mon Aug 17, 2015 2:12 pm

Re: Additional Pigment needed for FTD Deep Black?

Postby redonix76 » Tue Nov 03, 2015 8:07 pm

I was having similar issues with DB. I've since switched to SW + black pigment to make 50% gray and the bleeds are no longer an issue. I'm guessing that adding more pigment to DB cold help but not sure how much. Good luck and please keep us posted!

adambx
Posts: 119
Joined: Wed Apr 09, 2014 6:33 am

Re: Additional Pigment needed for FTD Deep Black?

Postby adambx » Wed Nov 04, 2015 1:00 pm

from what i read somewhere, in SW the pigment settles way faster than in DB. I have prints that take up to 10 hours, so i'm afraid it could be an issue. Can you comment anything on that? Any issues so far?

Cheers^^

redonix76
Posts: 36
Joined: Mon Aug 17, 2015 2:12 pm

Re: Additional Pigment needed for FTD Deep Black?

Postby redonix76 » Wed Nov 04, 2015 4:09 pm

Hello,

Yeah so the difference between SW and DB is that SW has more pigment and does settles faster than DB. Now in terms of long print time, If you have a top down, it's definitely going to settle faster than using a bottom up printer, simply because bottom up tends to help stir up the resin more from it's movements and small amount of resin in the vat. I started with a top down but since converted it to bottom up.

Honestly though the longest I've gone is about 7 hours so I can't really say if 10+ hours will have settling issues or not. If you leave it in the vat and not use it, just over night I can see that the top layers is more transparent and the bottom is more opaque. I think overall, as long as you stir up the resin well before printing, and you dont put too much extra resin in the vat, the consistency should be good through the duration of the print.

Overall I'm happy withe SW and at $72.50 a bottle it's well worth the price I'd say.

adambx
Posts: 119
Joined: Wed Apr 09, 2014 6:33 am

Re: Additional Pigment needed for FTD Deep Black?

Postby adambx » Wed Nov 04, 2015 4:36 pm

thanks for the info. I have a bottom-up and I might eventually build some kind of stirring mechanism, because i want to focus on long builds.

I will surely try SW!

JosephOsborn
Posts: 38
Joined: Sat Jan 17, 2015 9:33 pm

Re: Additional Pigment needed for FTD Deep Black?

Postby JosephOsborn » Wed Nov 04, 2015 5:34 pm

I received my black pigment from Makerjuice today after ordering it just two days ago. After two weeks I still haven't received a reply from Studioquebed about buying the FTD pigment...
I'll try mixing some pigment into my Deep Black tonight, starting with just a little and increasing it until the z-bleed gets better. I'll be sure to report my results here. Thanks for all the comments.

redonix76
Posts: 36
Joined: Mon Aug 17, 2015 2:12 pm

Re: Additional Pigment needed for FTD Deep Black?

Postby redonix76 » Thu Nov 05, 2015 3:29 pm

Hi Joseph, yeah it's too bad they dont sell pigment separately on their web site. If you buy SW you automatically get to choose a pigment color for no extra charge. To make gray I only used a little bit and still have a ton of black pigment for future usage. Hopefully they will update their website.

Hopefully your bleed issue will be gone soon!! Keep us posted!!

JosephOsborn
Posts: 38
Joined: Sat Jan 17, 2015 9:33 pm

Re: Additional Pigment needed for FTD Deep Black?

Postby JosephOsborn » Sun Nov 08, 2015 9:32 pm

So I added some black pigment to my Deep Black; not a lot, just approximately 0.4ml to 250g of resin. That works out to be around 1.6ml per kilogram, and Danny at FTD told me that I could add up to 4ml per kilogram. I've run about a dozen prints using only 30 and 50 micron slices and overall there is some improvement I can see in my prints. I did not have to increase exposure time very much to compensate for the extra pigment. The surface quality on my prints still isn't quite where I want it, so I may increase the concentration to about 2.4ml per kilogram and see if that works better. However, I might keep the pigment concentration the same and work with orientation and support placement to achieve better surfaces. Or maybe switch to Snow White resin with black pigment:)

redonix76
Posts: 36
Joined: Mon Aug 17, 2015 2:12 pm

Re: Additional Pigment needed for FTD Deep Black?

Postby redonix76 » Thu Nov 12, 2015 5:19 pm

Hi Joseph,

Have you tried decreasing exposure time? I think the trick is to get just enough exposure to make sure the layers stick together and pulls off the vat. I'm in the same boat of trying to figure out the correct time...adding pigment will change the timing so you'll have to figure that out accordingly. Generally faster exposure time will give you less bleed and better details on your print.

Right now I'm experimenting with 70% DB and 30% SW...still messing with the exposure time...hopefully I can work it out tonight. I'll post some photos once I've manage to get the correct timing.


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