Lead Bisilicate Frit 10.05 (Keramikos)
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Frits
- Formula
- SiO₂ 33.8%, Al₂O₃ 1.48%, PbO 64.72%
- Also called
- Loodbisilicaat fritte 10.05, Lood-bi-silicaat 3647, Fritte 10.05 loodbisilicaat, Loodbisilicaat 3531, VTR29
- Made by
- Sold under the Keramikos brand and by other Dutch suppliers; producer not stated
- Sold in
- EU
- Similar materials
- Lead Bisilicate Frit (Potclays 2261)
- Source
- Cock Keramiek, product page 'Fritte 10.05 Loodbisilicaat' (Seger formula) (2026-02)
Standard lead bisilicate frit (PbO·2SiO2 with a little alumina) for low-fired earthenware and majolica glazes; it is the Dutch counterpart of UK lead bisilicate. Sold by Cock Keramiek, Ve-Ka (as 3647) and De Beeldhouwwinkel (Keramikos 10.05).
Oxide analysis and unity formula
Glazecalc has the analysis of Lead Bisilicate Frit 10.05 (Keramikos) as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Lead Bisilicate Frit 10.05 (Keramikos) that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
| Oxide | Weight % | Unity contribution |
|---|---|---|
| SiO₂ | 33.8 | 1.940 |
| Al₂O₃ | 1.48 | 0.050 |
| PbO | 64.72 | 1.000 |
- Equivalent weight
- 344.87
- Fired weight
- 344.87
- Loss on ignition
- 0%
The equivalent weight is the grams of Lead Bisilicate Frit 10.05 (Keramikos) that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
This material contains lead oxide (PbO).
Hazards: CONTAINS LEAD (PbO about 65%). Cock Keramiek marks it 'Gevaarlijke stof'. Lead frits are classified in the EU as Repr. 1A and STOT RE 1. Reimbold & Strick's SDS for its lead frit A 1316 P lists: H302+H332 (harmful if swallowed or inhaled), H351 (suspected of causing cancer), H360Df (may damage the unborn child; suspected of damaging fertility), H372 (damages organs through prolonged exposure) and H410 (very toxic to aquatic life). Use it only with dust control, gloves and good hygiene, and keep it away from children and food areas. Lab-test any glaze made with it for lead release before it is used on food or drink surfaces.
Use it in a recipe
Add Lead Bisilicate Frit 10.05 (Keramikos) to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.