<p>I discovered this by accident while gluing two pieces of 3D printed PLA with UV-curing adhesive.  It's not a problem but I'm curious about why the two materials appearance under UV light is so different.</p>
<p>The PLA came from two different vendors.</p>
<p><a href="https://i.sstatic.net/Em2qh.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Em2qh.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2022-05-23T18:00:39.793Z
Can you add information about what color the PLA is (supposed to be). I can't tell if it's white, gray, uncolored (cloudy semi-translucent), or something else.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2022-05-23T18:56:39.400Z
Both nominally white though there's a slight but obvious color difference between them when viewed under normal light. The non-fluorescent one looks a little more yellowish. I think one spool was Solutech but not sure.
allardjd
CC BY-SA 4.0
2022-05-23T18:58:09.223Z
The pinkish color on the left one must be a camera artifact; not really like that.
allardjd
CC BY-SA 4.0
2022-05-23T22:17:56.050Z
The "pinkish" color is probably not a camera artifact, but the camera seeing UV as violet due to the way its filters are set up.
user10489
CC BY-SA 4.0
2022-05-24T03:51:31.463Z
That sounds like a camera artifact to me. The camera is displaying something that's not actually there.
allardjd
CC BY-SA 4.0
2022-05-24T05:16:48.423Z
It is there, just not in a color we normally can see well.
user10489
<pla><filament>
What causes different fluoresence of PLA from different sources?
allardjd
# What causes different fluoresence of PLA from different sources?

(Asked by: username_0 on 2022-05-23)

I discovered this by accident while gluing two pieces of 3D printed PLA with UV-curing adhesive. It's not a problem but I'm curious about why the two materials appearance under UV light is so different.

The PLA came from two different vendors.

[![enter image description here](https://i.sstatic.net/Em2qh.jpg)](https://i.sstatic.net/Em2qh.jpg)

**Tags:** pla, filament
> **Comments:**
> **username_1**: Can you add information about what color the PLA is (supposed to be). I can't tell if it's white, gray, uncolored (cloudy semi-translucent), or something else.  
> **username_0**: Both nominally white though there's a slight but obvious color difference between them when viewed under normal light. The non-fluorescent one looks a little more yellowish. I think one spool was Solutech but not sure.  
> **username_0**: The pinkish color on the left one must be a camera artifact; not really like that.  
> **username_2**: The "pinkish" color is probably not a camera artifact, but the camera seeing UV as violet due to the way its filters are set up.  
> **username_0**: That sounds like a camera artifact to me. The camera is displaying something that's not actually there.  
> **username_2**: It is there, just not in a color we normally can see well.  

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## 0 answers

