How to Choose a Premium Ru Ware Teacup

1. Glaze Quality

Color: Look for the signature "sky-after-rain" celadon (Pantone 19-4052 TCX). Avoid dull or overly uniform hues.

Texture: Surface should resemble cracked ice (not sharp cracks) – fine "frost veins" that feel smooth to touch.

2. Kiln Type

Wood-fired kilns (1300°C ±30°C) create natural Mineral Bloom® patterns.

Reject electric kiln pieces with mechanical crackle.

3. Sound Test

Gently tap: Authentic Ru ware produces a low-frequency hum (~300Hz, like a guqin note).

High-pitched "ting" indicates inferior body density.

4. Craftsmanship

Foot rim: Hand-carved, unglazed "iron foot" with orange-peel texture.

Weight: 60-80g for standard cups (balance = good clay refinement).

5. Provenance

Demand lab reports for:
▸ Agate content (≥0.3%)
▸ Firing temperature curve
▸ Microphotography of frost veins

6. Patina Potential

Quality pieces darken frost veins with tea (predictable 0.02mm/year growth).