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Technique

Ceramic overglaze enamelling

لعاب رویی

Ceramic overglaze enamelling is a working process used in minai-ware. Sequence and materials vary between workshops; this entry is an educational overview, not an authentication method.

Process, step by step

  1. Glaze and fire the ware
  2. Paint enamel over the glaze
  3. Fire again at lower heat

Variations

Mina’i ware is a historical ceramic category, not metal minakari.

Conservation

Do not wash flaking surface decoration.

Painting on a fired glaze

Overglaze enamelling applies coloured glassy pigments on top of an already fired glaze, followed by a second, lower-temperature firing. The best-known Iranian example is minai (haft-rang) ware made mainly in Kashan in the late twelfth and early thirteenth centuries, which allowed a fuller palette than underglaze painting.

References: [1]

Recognising overglaze

Overglaze colours sit on the surface and can wear or flake, leaving 'ghost' outlines, while underglaze colours are sealed beneath. Minai is also a field heavily affected by restoration and overpainting; raking light and ultraviolet examination by specialists are standard.

References: [1]

Not the same as metal minakari

Contemporary Isfahan minakari enamels copper or silver and is a different craft, although both use vitreous enamel. Keep the ceramic technique and the metal craft distinct in descriptions.

References: [1]

Care

Never wash or rub overglaze decoration. Display away from vibration and keep fragments for a conservator.

References: [1]

Practical questions

  • Is minai the same as minakari? No; one is ceramic, the other metal.
  • Why is minai often restored? Overglaze colours wear easily.
What an observation can—and cannot—establish
ObservationUseful descriptionNot established
Colours raised on glazeOverglaze techniqueKashan origin
Unusually fresh figuresPossible overpaintOriginal decoration
Worn ghost outlinesLost enamelAge

References and further reading

  1. [1] A. U. Pope & P. Ackerman (eds.), A Survey of Persian Art, Oxford University Press, 1938–39.Broad historical context; individual claims need current scholarship.
  2. [2] Encyclopaedia Iranica ↗Peer-reviewed entries on motifs, crafts and terms.

These sources provide context, not authentication or provenance for an individual object. Editorial interpretations remain under review.

Documented material and craft examples

overglaze enamelling — representative craft example, not material authentication
overglaze enamelling — representative craft example, not material authenticationMina’i ware object, museum record 1917.977Cleveland Museum of Art · CC0 / public domain (museum open access) · Image source ↗

Representative photographs only. Marketplace examples rely on seller descriptions; CraftPersia has not independently authenticated their maker, origin, or rights status. Follow each source link for the listing context.

Used in these crafts

Mina'i ware

A historic overglaze-enamelled stonepaste ware produced mainly in Iran during the twelfth and early thirteenth centuries, decorated with figural and courtly scenes painted in multiple colours applied after glazing and fixed by a low second firing.