<p>Thank you folks.  The issue was bad/old resin and left in the tank too long.  Replacing all my stocks with fresh and following rigorous stirring and decanting I now have resin curing well during the print.
Sorry to have taken so long to get back to it.</p>

CC BY-SA 4.0
2020-04-21T16:52:55.977Z
2020-04-21T16:52:55.977Z
R.Powell
<p>It might be the case that the resin separated into layers in the tray. Try mixing the resin well in its container. </p>

<p>I have also heard it can help to filter the resin prior to mixing.</p>

CC BY-SA 4.0
2019-02-22T21:16:12.280Z
2019-02-25T18:31:47.917Z
2019-02-25T18:31:47.917Z
Adukra
<p>My model layers are printing much as I expect but the parts when removed from the plate are very soft and flexible and fail to harden any further in sunlight or UV lamplight.  A tall or slender part will bend and distort under its own weight while printing.  I am using LCD-T resin, I have increased time and reduced thicknesses and am now using 0.04&nbsp;mm layers at 20&nbsp;s and 255 brightness with no improvement.
Can anyone suggest what I need to change?</p>

CC BY-SA 4.0
2019-02-21T16:35:44.347Z
Could it be something wrong with the raw resin? How are you storing it (temperature and lighting conditions)? How old is it?
Dan Hulme
CC BY-SA 4.0
2019-02-21T21:39:56.143Z
can you run a hard-test of the resin by pouring a tiny sample onto a glass surface and leave it out in the sun? Don't tough it though
Trish
CC BY-SA 4.0
2019-02-22T14:25:20.023Z
This has nothing to do with post-processing.  If the part is sagging in the chamber (or when removed from the plate), then the cure-time per layer (illumination time) is probably set  too short.
Carl Witthoft
<sla><resin>
Sparkmaker SLA resin not curing
R.Powell
# Sparkmaker SLA resin not curing

(Asked by: username_0 on 2019-02-21)

My model layers are printing much as I expect but the parts when removed from the plate are very soft and flexible and fail to harden any further in sunlight or UV lamplight. A tall or slender part will bend and distort under its own weight while printing. I am using LCD-T resin, I have increased time and reduced thicknesses and am now using 0.04 mm layers at 20 s and 255 brightness with no improvement.
Can anyone suggest what I need to change?

**Tags:** sla, resin
> **Comments:**
> **username_1**: Could it be something wrong with the raw resin? How are you storing it (temperature and lighting conditions)? How old is it?  
> **username_2**: can you run a hard-test of the resin by pouring a tiny sample onto a glass surface and leave it out in the sun? Don't tough it though  
> **username_3**: This has nothing to do with post-processing.  If the part is sagging in the chamber (or when removed from the plate), then the cure-time per layer (illumination time) is probably set  too short.  

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## 2 answers

### Answer by username_0 on 2020-04-21. Score: 2

Thank you folks. The issue was bad/old resin and left in the tank too long. Replacing all my stocks with fresh and following rigorous stirring and decanting I now have resin curing well during the print.
Sorry to have taken so long to get back to it.


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### Answer by username_4 on 2019-02-22. Score: 2

It might be the case that the resin separated into layers in the tray. Try mixing the resin well in its container.

I have also heard it can help to filter the resin prior to mixing.


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