Alkali Frit 15.10 (Keramikos)
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Frits
- Formula
- SiO₂ 63.12%, Al₂O₃ 3.06%, CaO 2.81%, ZnO 8.96%, K₂O 2.83%, Na₂O 19.22%
- Also called
- Alkali fritte 15.10, Alkalifritte 1510, Alkali 2495 (mg 200), Keramikos CH150E
- Made by
- Sold under the Keramikos brand (Keramikos B.V., Haarlem, Netherlands); producer not stated
- Sold in
- EU
- Similar materials
- High Alkaline Frit (Potterycrafts P2962)
- Source
- Keramikos, product page 'Alkali fritte 15.10 1 kg' (Seger formula)
A sodium-zinc alkali frit with no boron and little alumina: the classic Dutch 'alkalifritte 1510' for alkaline glazes such as turquoise copper blues, raku and crackle. Keramikos and Ve-Ka (as 'Alkali 2495') still sell it in 2026. Keramikos now also sells 'Alkali fritte 21.20' as its replacement.
Oxide analysis and unity formula
Glazecalc has the analysis of Alkali Frit 15.10 (Keramikos) as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Alkali Frit 15.10 (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 | 63.12 | 2.100 |
| Al₂O₃ | 3.06 | 0.060 |
| CaO | 2.81 | 0.100 |
| ZnO | 8.96 | 0.220 |
| K₂O | 2.83 | 0.060 |
| Na₂O | 19.22 | 0.620 |
- Equivalent weight
- 199.86
- Fired weight
- 199.86
- Loss on ignition
- 0%
The equivalent weight is the grams of Alkali Frit 15.10 (Keramikos) that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Leadless. Keramikos states that it is not classified as hazardous under CLP. Avoid breathing the dust.
Use it in a recipe
Add Alkali Frit 15.10 (Keramikos) to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.