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SaitechAI — Solids (Non-Volatile) % Calculator

SaitechAI — Solids (Non-Volatile) % Calculator Binder / Resin / Paint

Compute solids by mass from oven-loss data and follow standard test procedures with ASTM/ISO/BIS references.

Interactive Calculator

Use either the pan method (preferred) or direct sample/residue masses.

Report temperature & time with every result

Weighing mode

Decimals

Pan mass, W_p (g)

Before oven, W₁ (pan + wet) (g)

After oven, W₂ (pan + dry) (g)

Replicate # (optional)

Oven setpoint (°C)

Typical: 110 ± 5 °C for 60 min (ASTM D2369). For varnishes, see ASTM D1644 schedules.

Hold time (min)

Record any deviations (thick films, reactive systems, etc.).

Sample taken—

m_sample

Residue (non-volatile)—

m_residue

Solids by mass—

% non-volatile

Prepare representative sample (mix gently; avoid air entrapment). Follow BIS sampling guidance.
Dry, clean, and precondition weighing pan or aluminium dish; record mass W_p (±0.001 g).
Weigh ~1–2 g of material (high-solids may use ≤1 g). Record W₁ (pan + wet).
Spread as a thin uniform film to accelerate solvent release.
Oven: 110 ± 5 °C for 60 min (typical for coatings per ASTM D2369). Varnishes: see ASTM D1644 schedules.
Cool in desiccator (10–15 min) and weigh W₂ (pan + dry).
Calculate Solids % = ((W₂−Wₚ)/(W₁−Wₚ))×100. Volatile % = 100 − Solids %.
Run duplicate determinations; report mean and conditions (temp/time, atmosphere, any inhibitors).

Notes & good practice

Highly reactive systems (2K PU/epoxy) may cure further; use shortest feasible time; record gel/skin formation.
Water-borne with coalescents: ensure full removal; if foaming, extend time or use step temperature with caution.
If splatter/volatilization occurs, use covered dish with vent or reduce sample mass.
Report density separately if you need volume solids (ISO 3233 route).

ASTM D2369 — Volatile content of coatings (110 ± 5 °C, 60 min typical). Inverse gives % non-volatile (solids). :contentReference[oaicite:0]{index=0}
ASTM D1644 — Non-volatile content of varnishes (procedures & schedules). :contentReference[oaicite:1]{index=1}
ISO 3251:2019 — Determination of non-volatile-matter content by mass for paints/varnishes/binders. :contentReference[oaicite:2]{index=2}
BIS IS 101 (Part 2/Sec 2) — Chemical examination: Volatile matter (use inverse for solids %). :contentReference[oaicite:3]{index=3}
BIS IS 101 (Part 8/Sec 2) — Pigments & non-volatile matter in paints/related products. :contentReference[oaicite:4]{index=4}
For volume-solids & spreading rate: ISO 3233-1. :contentReference[oaicite:5]{index=5}

Always cite the exact edition/date used in your COA/QC report.