# How to use NLP with Flextight Scans 3f?

**URL:** <https://forums.negativelabpro.com/t/how-to-use-nlp-with-flextight-scans-3f/1519>\
**Category:** Flatbed and Film Scanners\
**Created:** [April 8, 2020, 9:35am UTC](https://forums.negativelabpro.com/t/how-to-use-nlp-with-flextight-scans-3f/1519 "2020-04-08T09:35:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wellcome86](https://avatars.discourse-cdn.com/v4/letter/w/b5ac83/32.png) [@wellcome86](https://forums.negativelabpro.com/u/wellcome86)\
**Post date:** [April 8, 2020, 9:35am UTC](https://forums.negativelabpro.com/t/how-to-use-nlp-with-flextight-scans-3f/1519/1 "2020-04-08T09:35:08Z")

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Hi there,

I scan my film with a **Flextight** scanner in **3F**.  
I’m a bit confused about the **Tiff Prep Scan** function.

1. Shall I colorbalance the orange mask before using **Tiff Prep Scan** function or after?
2. Why is **Tiff Prep Scan** function making a **1.8 Gamma** correction?  
Are the 3F (Tiff) files 1.8 Gamma or 2.2 and being corrected to 1.8?
3. How are you guys dealing with that?

thanks

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**Author:** ![nate](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.negativelabpro.com/nate/32/4_2.png) [@nate](https://forums.negativelabpro.com/u/nate)\
**Post date:** [April 8, 2020, 1:46pm UTC](https://forums.negativelabpro.com/t/how-to-use-nlp-with-flextight-scans-3f/1519/2 "2020-04-08T13:46:22Z")

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> [@wellcome86](#):
>
> Shall I colorbalance the orange mask before using **Tiff Prep Scan** function or after?

Don’t use the white-balance tool at all in Lightroom.

> [@wellcome86](#):
>
> Why is **Tiff Prep Scan** function making a **1.8 Gamma** correction?

My understanding is that the 3f files are scanned at gamma 1.8. The Tiff Scan Pref utility is first converting the file from 1.8 gamma to linear gamma (1.0), applying color multipliers in that linear space, and then converting to gamma 2.2 (to be used in Lightroom).

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**Author:** ![wellcome86](https://avatars.discourse-cdn.com/v4/letter/w/b5ac83/32.png) [@wellcome86](https://forums.negativelabpro.com/u/wellcome86)\
**Post date:** [April 9, 2020, 12:22pm UTC](https://forums.negativelabpro.com/t/how-to-use-nlp-with-flextight-scans-3f/1519/3 "2020-04-09T12:22:51Z")

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Ok thanks,

so the tiff prep is searching aline for the orange mask values?