# Calendered Sheet vs Home-Cast Film

Human page: https://retifist.com/literature-reviews/calendered-sheet-vs-home-cast-film

> **Safety.** Liquid latex work: ammonia, coagulant salts, metal hygiene.

## Executive summary

**Sheet-based work** buys calendered/catalog sheet (ISO tolerance scope). **Liquid latex work** forms film from liquid via spread, cast, or coagulant dip — handbook physics apply. Same mm label does not imply matched properties.

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## Formation comparison

| | Sheet-based work | Liquid latex work |
| --- | --- | --- |
| Input | Roll goods | Liquid compound |
| Thickness QC | ISO 3302-1 class[^3] | TSC, dwell, coagulant[^2] |
| Formation detail | Mill calendering | Spread/cast/dip[^1][^4][^5] |

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## Sheet-based work

Calendered sheet tolerance framework.[^3] Vendor thickness menus.

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## Liquid latex work branches

Lab glass spread (Anode/Teague).[^1] Belt spreading patents.[^6][^7] Coagulant for thick dips (>8 mil economics).[^2] Casting taxonomy.[^5] Metal ban.[^4]

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## Buy vs make

Buy for repeatability without dip plant controls. Make for custom compound — accept formation discipline.

See also [Sheet vs Liquid Film Pathways](/literature-reviews/sheet-vs-liquid-film-pathways).

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## Endnotes

[^1]: Vanderbilt — Ch 14 lab spread p.188.
[^2]: Vanderbilt — Ch 16 coagulant economics p.200; wet gauge p.205.
[^3]: ISO 3302-1 (scope).
[^4]: Vanderbilt — metal hygiene p.198.
[^5]: HPL v3 — moulding/casting §23.3.
[^6]: US 2,415,028 spreading patent.
[^7]: US 2,129,607 multi-coat patent.

<details>
<summary>Deep dive: Lab spread</summary>

Anode vs Teague; leach times.[^1]

</details>

<details>
<summary>Deep dive: Belt spreading patents</summary>

Continuous and multi-coat industrial sheet.[^6][^7]

</details>

<details>
<summary>Deep dive: Coagulant >8 mil</summary>

Economics for thick dip build.[^2]

</details>