CupClay

Shop Now

Ru Porcelain — A 1000-Year Legacy of Living Frost

Our Story

"The color of sky after rain" — this 12th-century poetic decree by Emperor Huizong gave birth to Ru Porcelain's celestial glaze, a hue so elusive it was said to capture the moment between storm and sunshine. For a thousand years, these treasures witnessed imperial tea rituals, their "living frost" veins deepening like memories in silent devotion.
Fired at 1300°C with crushed agate — a technique lost and rediscovered — each piece embodies the 1% miracle of the kiln. Now bridging the Song Dynasty to your hands, every touch awakens its legacy: your tea becomes its newest chapter.

Handmade Tea Cups9

Check out all our products

Blog posts

The alchemy of fire: Wood kiln vs. Electric kiln in ru ware

The alchemy of fire: Wood kiln vs. Electric kiln in ru ware

1. Temperature dynamics & glaze effects   • wood kiln - firing curve: 72-hour nonlinear firing (±30°c swings) - key reaction: Agate molecules crystallize unevenly → frost fingerprints™ - color depth: 3d "Sky-after-rain" Gradient (pantone 19-4052 tcx → 16-5421 tcx)...

Read more

The Science Behind Ru Ware's Frost Veins ("Crackle Patterns")

The Science Behind Ru Ware's Frost Veins ("Crackle Patterns")

1. Fundamental Causes - Thermal Stress:   • Clay (α=5.4×10⁻⁶/°C) & glaze (α=7.1×10⁻⁶/°C) coefficient mismatch   • Generated during cooling from 1300°C→200°C at ~15°C/min rate - Crystalline Growth:   • Mullite (3Al₂O₃·2SiO₂) needles form at 1100-1250°C   • Agate particles create localized stress points...

Read more

How to Cultivate Ru Ware Teacups for Enhanced Frost Veins

How to Cultivate Ru Ware Teacups for Enhanced Frost Veins

1. Tea Selection Principles - Optimal Types:   • Fully-oxidized teas (e.g. Pu-erh, Black Tea)   • Mineral-rich varieties (Wuyi Rock Tea, Aged White Tea) - Avoid:   • Green/light oolongs (low tannin content)   • Flavored/scented teas (chemical interference)   2. Brewing Methodology...

Read more

How to Choose a Premium Ru Ware Teacup

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...

Read more

The History and Evolution of Ru Ware Celadon

The History and Evolution of Ru Ware Celadon

1. Origins (Northern Song Dynasty: 960-1127 AD) - Imperial Commission:   • Founded circa 1086 under Emperor Huizong's decree   • Exclusive to royal court for 40 years (1086-1126) - Legendary Standard:   • "Sky-after-rain" glaze color mandated by imperial poem   • Only...

Read more