# Debris During Printing

**URL:** <https://forum.formlabs.com/t/debris-during-printing/24001>\
**Category:** Support & Troubleshooting\
**Created:** [July 16, 2019, 9:54am UTC](https://forum.formlabs.com/t/debris-during-printing/24001 "2019-07-16T09:54:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![GrassCube](https://avatars.discourse-cdn.com/v4/letter/g/a5b964/32.png) [@GrassCube](https://forum.formlabs.com/u/GrassCube)\
**Post date:** [July 16, 2019, 9:54am UTC](https://forum.formlabs.com/t/debris-during-printing/24001/1 "2019-07-16T09:54:16Z")

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Hi,

Recently, after printing is done (using the clear and black resins) a thin film attached to the raft of the model can be noticed.  
Every time this film appears there are debris in the resin and adhered to the printed models.  
The rafts doesn’t seem to be deformed or delaminated (from poorly placed or lack of supports), its like the first couple of layers of the raft the laser was defused and the edge of the raft “spilled” a bit.  
The film extends from the raft no more than 4-5mm.

Technical data

1. printing resolution 0.25um
2. Resin tank F2-01
3. Resins used Black (GPBK-04) & Clear (GBCL-04)
4. Models placement: there were several models with individual rafts, filling roughly 80-85% of the printing surface.

Any similar experiences and possible fixes?

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**Author:** ![P3D](https://avatars.discourse-cdn.com/v4/letter/p/2acd7d/32.png) [@P3D](https://forum.formlabs.com/u/P3D)\
**Post date:** [July 16, 2019, 3:26pm UTC](https://forum.formlabs.com/t/debris-during-printing/24001/2 "2019-07-16T15:26:49Z")

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Most probably an optics issue, like a fogged up optical window or mirror. Contact FormLabs support, they’ll give you exact cleaning instructions. This way you also avoid voiding your warranty by just doing stuff by yourself.

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**Author:** ![Zachary\_Brackin](https://avatars.discourse-cdn.com/v4/letter/z/4da419/32.png) [@Zachary\_Brackin](https://forum.formlabs.com/u/Zachary_Brackin)\
**Post date:** [July 17, 2019, 4:02pm UTC](https://forum.formlabs.com/t/debris-during-printing/24001/3 "2019-07-17T16:02:52Z")

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That may be dirty optics.

Also, does it happen when printing at 50 or 100 microns?

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**Author:** ![system](https://us1.discourse-cdn.com/flex025/uploads/formlabs/original/3X/5/b/5bc2bdf993ff27c2e0eecab5010b25626fbb327a.png) [@system](https://forum.formlabs.com/u/system)\
**Post date:** [July 31, 2019, 4:12pm UTC](https://forum.formlabs.com/t/debris-during-printing/24001/4 "2019-07-31T16:12:28Z")

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