# Gauge, Modulus & Reduction: Fit Science

Human page: https://retifist.com/literature-reviews/gauge-modulus-reduction-fit-science

## Executive summary

**Gauge** is thickness. **Modulus** is stiffness at stretch. **Reduction** is pattern geometry. Industrial curves link fillers and modifiers to modulus. Use when thickness and tight-fit lore are conflated.

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## Definitions

Film must stretch ≥2×.[^1] Gauge (mm), modulus (MPa at extension), reduction (pattern %) are separate levers.

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## Sheet-based work thickness

ISO 3302-1 tolerance class for calendered sheet.[^2] Vendor menus ~0.25–1 mm.

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## Liquid latex work modulus levers

Clay filler stiffens.[^3] High-styrene SBR raises modulus and set.[^4] MG graft latex raises modulus/tear.[^5]

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## Endnotes

[^1]: Vanderbilt — ≥2× stretch.
[^2]: ISO 3302-1 (scope).
[^3]: Vanderbilt — DIXIE clay curve.
[^4]: HPL v3 Table 16.12.
[^5]: Vanderbilt — MG latex summary.

<details>
<summary>Deep dive: Table 16.12</summary>

Modulus/tear/set vs high-styrene SBR load.[^4]

</details>

<details>
<summary>Deep dive: DIXIE clay</summary>

Tensile vs stress @500%.[^3]

</details>

<details>
<summary>Deep dive: MG latex</summary>

Modulus/tear tuning via graft NR.[^5]

</details>