3D printer and health ... A marvelous technological breakthrough, but beware of the risks!

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Ahmed
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Ahmed » 24/09/20, 13:23

Bah! The "rabbit" sand (sieved) is still very fine, I think ... I used it to bend delicate tubes.
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Christophe » 24/09/20, 13:25

"Fine" is a pifometric unit Furthermore ? : Cheesy:

This document should please you! Knowing you - if not already known ...
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Ahmed » 24/09/20, 13:55

Tasty! We cannot sufficiently recognize the practical importance of pifometry, the only unit of measurement capable of accounting for the subtle nuances of human subjectivity. 8)
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Christophe » 24/09/20, 13:58

That's quite right !

I knew you would like it! 8)
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Adrien (ex-nico239) » 24/09/20, 14:49

Christophe wrote:
Adrien (ex-nico239) wrote:Have a question ...

I spent a lot of time ...

(...)

But if you have brands to recommend to me, it would be great.


It's a good question (it deserves a dedicated topic) apparently the quality of plastics is quite different ... it's a bit like pellets ... the standards less. : Cheesy:

Many advise to go on 3DJack ... not tested.

Sunlu has a PLA + range (a bit like DIN + ah ah ah) ... with, obviously, nothing but praise. I will test on my next purchases ...

I finished a coil of neutral transparent PLA ... which never was. The pieces are whitish, at best very slightly translucent on some layers. Do you have any advice on setting to manage transparency? It wasn't a big deal for the parts I was printing but hey ... it didn't meet expectations ...


For transparency no idea
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Petrus » 24/09/20, 14:56

Christophe wrote:Not having enough table salt, I just launched a test with baking soda (its salt looks very fine ... so it looks more like baking soda in texture than kitchen salt ... ).

Yes, its salt has been ground, I also thought of baking soda instead of pissing off grinding salt.
Ahmed wrote:Why not fine sand?

He tried with sand, but it stuck to the part without being able to remove it, with salt it can be dissolved.

Another youtuber trapped the pieces in plaster, it's much more annoying, but he made resistance measurements:
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Flytox » 24/09/20, 15:29

Christophe wrote:
I finished a PLA coil transparent neutral ... which never was. The pieces are whitish, at best very slightly translucent on some layers. Do you have any advice on setting to manage transparency? It wasn't a big deal for the parts I was printing but hey ... it didn't meet expectations ...


If it's like resin, the translucent slightly whitish becomes perfectly transparent after fine polishing. It is the coarse surface condition that causes light to "diffract". When the surfaces are flat it's "easy" to do with increasingly fine sandpaper, when the shape is choppy ... mmmmmhhhhhh how to say? : Wink: have to find another method.
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Christophe » 24/09/20, 16:20

Petrus wrote:Yes, its salt has been ground, I also thought of baking soda instead of pissing off grinding salt.


Baking soda seems like a good solution to me.

Here is my experience of the day, the parts were quite disgusting before (test parts) ... they are a little less so after, the effect is especially visible on flat surfaces where the streaks become less visible.

The guy in the video does say though that it only works with massive parts with 100% infill which mine does not.

I noticed a deformation on one of the finss.

It seems to me that the parts have gained in elasticity (subjective)

before:

20200924_121515.jpg
20200924_121515.jpg (330.22 KB) Viewed times 1932


Preparation:

20200924_121757.jpg
20200924_121757.jpg (62.96 KB) Viewed times 1932


After 45 min at 240 ° C (precision 20 ° C since it is a stove!)

Demoulding:

20200924_142451.jpg
20200924_142451.jpg (234.59 KB) Viewed times 1932


after:

20200924_161344.jpg
20200924_161344.jpg (151.96 KB) Viewed times 1932


Inspection:

20200924_143701.jpg
20200924_143701.jpg (38.91 KB) Viewed times 1932


20200924_143639.jpg
20200924_143639.jpg (37.64 KB) Viewed times 1932


In short in my case it is far from being a success ... the next test I will put the oven to full strength (250 ° C ... in theory)
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Christophe » 24/09/20, 16:22

Flytox wrote:
If it's like resin, the translucent slightly whitish becomes perfectly transparent after fine polishing. It is the coarse surface condition that causes light to "diffract". When the surfaces are flat it's "easy" to do with increasingly fine sandpaper, when the shape is choppy ... mmmmmhhhhhh how to say? : Wink: have to find another method.


It's not slightly whitish it's white ... in places, less than 1%, it's slightly translucent!
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Re: 3D printer and health ... A marvelous technological advance, but beware of the risks!




by Petrus » 24/09/20, 19:15

Is the wire transparent on the spool?
If so, it may have taken in moisture and bubbles formed during printing.
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