Crocus Martis
$8.40
Item #: CH-CM
| Qty: | Unit Price: |
|---|---|
| 5 | $6.30 |
| 25 | $5.25 |
| 50 | $4.73 |
| 100 | $4.20 |
Priced Per Pound
Crocus Martis is the trade name for anhydrous ferrous sulphate (FeSo4) and is also known as calcined copperas. This is a material that has traditionally been used as a substitute for red iron oxide, and is often not as soluble as iron oxide -- as a result, this can result in specking in glazes, which may be a desirable effect for some. Please note that this material releases sulphur during firing, and may not decompose completely until 1200C or higher.
Historically this was a natural ocurring mineral with varying chemical compositions. Now it is commercially produced to approximate the natural mineral. Because of this, we recommend testing each glaze recipe mixed with this commercially developed version.
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