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Emulsion Side / Emulsion / Dull Side
Camera · Technique

Emulsion Side / Emulsion / Dull Side

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film stock base side negative film gate

The light-sensitive coating side of film stock containing silver halide crystals – must face the lens during exposure, identifiable by its matte finish compared to the shiny base side, critical for proper focus and image quality.

What is the Emulsion Side?

The Emulsion Side is the light-sensitive coating side of film stock. It contains the silver halide crystals that store the latent image upon exposure. This side must always face the lens.

Film Stock Construction

LayerDescription
EmulsionLight-sensitive
Subbing LayerAdhesion layer
BaseSupport material
Anti-HalationBackside coating

Identification

MethodDescription
VisualMatte vs. glossy
TactileRougher vs. smoother
Wound DirectionPerforation rule
Fingernail TestEmulsion stickier

Emulsion vs. Base

PropertyEmulsionBase
SurfaceMatteGlossy
FeelRoughSmooth
StickinessSlightNone
LightAbsorbsReflects

Importance of Orientation

SituationConsequence if incorrect
CameraUnsharp image
ScannerMirror image
ProjectorMirror image
PrinterErrors

Why Facing the Lens?

AspectExplanation
Plane of FocusEmulsion in focus
Base Thickness~0.13mm deviation
Optical QualityNo passage through base
Filmgate DesignDesigned for this

Different Film Formats

FormatEmulsion Position
35mmTowards lens (B-wind)
16mmCan vary
Super 8Standardized
65mm/IMAXTowards lens

Wind Designations

WindDescription
A-WindEmulsion outside
B-WindEmulsion inside
Camera StockMostly B-wind
Print StockVaries

Loading in Camera

StepImportance
CheckBefore loading
OrientationEmulsion towards lens
FilmgateCorrect position
DocumentationIn camera report

Error Prevention

MeasureDescription
TrainingAC fundamental knowledge
Systematic ApproachAlways check
LightingSafe light
Double CheckBefore closing

Emulsion Types

TypeCharacteristics
Color NegativeMultilayer
B&WSingle layer
ReversalDirect positive
PrintFor copies

Technical Specifications

ParameterTypical
Emulsion Thickness5–20 μm
Base Thickness125–175 μm
Total~150–200 μm
Grain SizeISO-dependent

Historical Context

EraDevelopment
1889Celluloid film
1920sPanchromatic
1930sTechnicolor
1950sTri-Pack Color

Handling

AspectPractice
TouchEdges only
CleanlinessNo fingerprints
MoistureAvoid
TemperatureControlled

Today

Although digital cameras dominate, film knowledge remains relevant for archival work, restoration, and the continued use of film stock by some cinematographers. Correct handling of the emulsion side is fundamental knowledge for anyone working with analog material.

From the crafts

Perspectives

Cinematographer

Die Emulsionsseite muss zur Linse zeigen – sonst ist das Bild unscharf wegen der Basedicke dazwischen. Im Dunkeln erkenne ich sie am Gefühl: matter, rauer.

Director

Als Regisseur muss ich das nicht im Detail wissen, aber ich verlasse mich darauf, dass der AC das Material richtig einlegt. Falsches Einlegen bedeutet unscharfes Material.

Producer

Falsches Einlegen des Films kostet einen Drehtag. Die Crew muss ihre Materialien kennen – bei Film ist technisches Grundwissen nicht optional.

More in the lexikon

Related terms

Test your knowledge

Quiz

1. Zu welchem Department gehört „Schichtseite / Emulsionsseite"?

2. Wie viele verschiedene Fachperspektiven bietet dieser Eintrag?

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