# Decoding Liquid Latex Bottle Labels
Human page: https://retifist.com/literature-reviews/liquid-decoding-bottle-labels
> **Label literacy, not medical advice.** Food-contact rubber tables and industrial concentrate specs do not certify fashion-garment wear clearance. See [Allergy and Skin Contact](/literature-reviews/allergy-and-skin-contact).
## Executive summary
Consumer “liquid latex” bottles rarely print industrial concentrate fields. Decode ammonia band, total solids, prevulcanized vs raw, and polymer family. ASTM D1076 and ISO 2004 define ammonia-preserved NR **concentrate** categories; they **do not apply to compounded** hobby bottles.[^1]
Use when choosing a bottle or when a seller cites food-contact or medical glove language. Pair with [Forming film from liquid latex](/literature-reviews/liquid-film-pathway) and [Liquid painting vs compounding pigment](/literature-reviews/liquid-painting-vs-compounding-pigment).
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## Label fields that mean something
ASTM D1076 covers concentrated, ammonia-stabilized NR latex categories and does not apply to compounded concentrates.[^1] ISO 2004 specifies ammonia-preserved centrifuged/creamed concentrate types including HA, LA, and MA bands with Cu/Mn limits on total solids.[^2]
A craft bottle that omits TSC, ammonia %, MST, and polymer family is not auditable against those specs.
Prevulcanized latex is vulcanized in the liquid; a proper prevulc deposit can approach conventional post-dried properties; overcure yields short, weak rubber.[^3] Read the bottle/TDS before assuming dry-only. See [Prevulcanized consumer latex](/literature-reviews/liquid-prevulcanized-consumer-latex).
Fresh latex coagulates within hours without preservation; ammonia is the primary preservative.[^4]
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## Marketing words that are not specs
| Label phrase | What it is not |
| --- | --- |
| “FDA approved” on a bottle | Usually food-contact ingredient tables (21 CFR 177.2600) or unrelated device claims[^5] |
| “Medical grade” | Medical device rules (e.g. 801.437) apply to regulated devices |
| “Body safe / skin safe” | No universal standard in the industrial specs used here |
| “100% latex” | May mean NR, synthetic, or acrylic. Read polymer family. |
Do not assume every bottle is prevulcanized NR because it dries tack-free.
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Deep dive: HA / LA / MA ammonia bands
Effective ammonia typically **>0.35%**; long storage often **0.6–1.0%** by weight. LA systems may pair reduced ammonia with TMTD/ZnO/lauric.[^4] Ask vendors for ammonia as NH₃ on wet latex (Vanderbilt reports NH₃ on wet latex, water phase, or dry rubber; example 62% latex at 0.65% NH₃ wet).[^6] See [Liquid ventilation and ammonia](/literature-reviews/liquid-ventilation-ammonia).
Deep dive: Prevulcanized vs post-cure on a label
Prevulcanized NR films peak tensile at lower modulus than postvulcanized films (particle integration).[^7] Gloves from prevulcanized latex need only warm-air drying.[^8] Post-form oven vulcanization of dried compound is a separate branch.[^9]
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## Endnotes
[^1]: ASTM D1076 — concentrated, ammonia-stabilized NR latex; does not apply to compounded concentrates.
[^2]: ISO 2004:2024 — HA / LA / MA ammonia-preserved centrifuged or creamed concentrate; Cu/Mn caps on total solids.
[^3]: Vanderbilt Latex Handbook — prevulcanized latex (liquid-state cure, overcure).
[^4]: *Practical Guide to Latex Technology* — preservation; effective ammonia levels; LA secondary packages.
[^5]: 21 CFR 177.2600 — food-contact rubber ingredient tables.
[^6]: Vanderbilt Latex Handbook — reporting NH₃ on wet latex, water phase, or dry rubber.
[^7]: *Polymer Latices Vol 3 — Application of Latices* — prevulc vs postvulc modulus (§16.2.4).
[^8]: Vanderbilt Latex Handbook — prevulc gloves dry-only (Ch 16).
[^9]: Vanderbilt Latex Handbook — post-form oven vulcanization of dried compound.