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Both of these have likely seen a year of service. Both are highly opaque. While that enables a thinner application and more even colouration, the higher zircon content needed can produce cutlery marking, even though the glaze is glossy. Notice the green one is also crazing.
Glossary |
Cutlery Marking
Ceramic glazes that mark from cutlery are either not properly melted (lack flux), melted too much (lacking SiO2 and Al2O3), or have a micro-abrasive surface that abrades metal from cutlery. |
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