<p>I am running test prints on a new Sainsmart Kumitsu KL-9, a large hobby-market resin printer with a price/volume hard to beat.</p>
<p>I had two of the test prints detach from the printing plate and fall into the vat. Standard settings are in place:</p>
<p><a href="https://i.sstatic.net/BieW7.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/BieW7.png" alt="Chitu Slicer settings" /></a></p>
<p>I am using a <a href="https://rads.stackoverflow.com/amzn/click/com/B081YMD1GN" rel="nofollow noreferrer" rel="nofollow noreferrer">pitch black Elegoo resin</a>. Does black resin generally require thinner slicing, or longer exposure times? The bottle recommends 60s and 8s, matching the default settings for the printer...</p>
<p>Suggestions appreciated!</p>

CC BY-SA 4.0
2020-11-12T12:46:04.720Z
Transmission in the visible light and UV can be different. If they recommend the same exposure, why doubting it? or did you test and find issues?
FarO
CC BY-SA 4.0
2020-11-13T11:33:36.580Z
Indeed. A few layers attach to the printing plate, and a few layers attach to the transparent bottom of the resin vat. occasionally, there is evidence of the print splitting at a layer (print "slipped" on the XY plane).
0xF2
CC BY-SA 4.0
2020-11-18T17:17:31.347Z
Elegoo updated the specs on the Amazon listing to 13-15Seconds and 70 seconds (different from what is listed on the bottle itself), but that still does not work right on a Kumitsu KL9. The mystery continues.
0xF2
<resin><sainsmart-kumitsu-kl9>
Different exposure time for black resin?
0xF2
# Different exposure time for black resin?

(Asked by: username_0 on 2020-11-12)

I am running test prints on a new Sainsmart Kumitsu KL-9, a large hobby-market resin printer with a price/volume hard to beat.

I had two of the test prints detach from the printing plate and fall into the vat. Standard settings are in place:

[![Chitu Slicer settings](https://i.sstatic.net/BieW7.png)](https://i.sstatic.net/BieW7.png)

I am using a [pitch black Elegoo resin](https://rads.stackoverflow.com/amzn/click/com/B081YMD1GN). Does black resin generally require thinner slicing, or longer exposure times? The bottle recommends 60s and 8s, matching the default settings for the printer...

Suggestions appreciated!

**Tags:** resin, sainsmart-kumitsu-kl9
> **Comments:**
> **username_1**: Transmission in the visible light and UV can be different. If they recommend the same exposure, why doubting it? or did you test and find issues?  
> **username_0**: Indeed. A few layers attach to the printing plate, and a few layers attach to the transparent bottom of the resin vat. occasionally, there is evidence of the print splitting at a layer (print "slipped" on the XY plane).  
> **username_0**: Elegoo updated the specs on the Amazon listing to 13-15Seconds and 70 seconds (different from what is listed on the bottle itself), but that still does not work right on a Kumitsu KL9. The mystery continues.  

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## 0 answers

