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Ubify Media & Design Operations
UI/UX & DIGITAL MEDIA SPECIALISTS
About This Tool
C-41 color film negatives have a heavy chemical amber/orange polymer base. Inverting with standard photo tools produces an unusable cyan cast. This tool subtracts the orange mask base and applies non-linear gamma curves for Kodak Portra, Gold, and Fuji Superia.
How to Use
- 1
Upload your scanned 35mm or 120 color film negative.
- 2
Select your film stock profile (Kodak Portra 400, Gold 200, Fuji Superia 400).
- 3
Use the split-screen comparison slider to fine-tune white balance and tint.
- 4
Download high-resolution developed positive color photographs.
Frequently Asked Questions
Why do color film negatives have an orange base?
C-41 film incorporates orange azo dye couplers to correct for unwanted light absorption of the cyan and magenta dyes during chemical exposure.
How does this tool eliminate the blue/cyan cast?
It samples the RGB values of the unexposed orange film border, divides each pixel's channels by that base density, and inverts along a non-linear logarithmic curve.