The Legend of Wat Rakang and Wat Bang Khun Prohm Somdej
The Rare and Unrecorded Molds
Deep Research Report: Wat Rakang and Wat Bang Khun Prohm Somdej — Especially the Rare and Unrecorded Molds

Somdej Dto with the famous Pra Somdej Gang Pla amulet of the Kru Tap Khaw Hiding Place Find
Wat Rakang and Wat Bang Khun Prohm Somdej amulets are held in the highest regard among Thai collectors for their artistry, spiritual efficacy, and historical weight. Wat Rakang Somdej is often referred to as the “Emperor of Amulets,” serving as the archetype for all subsequent Somdej amulets across Thailand. Both were created by Somdet Phra Phutthachan (To Phromrangsi), with assistance from local artisans, royal craftsmen, and master goldsmiths — notably Luang Wijarn Chianranyai, who refined the molds and introduced techniques that enhanced durability and aesthetic refinement.

Somdej Pra Puttajarn (Dto) Prohmrangsri Wat Sadter Amulets
This report examines origins, creators, sacred materials, physical characteristics, age verification, methods of authentication, mold defects, related legends, analysis of rare/unrecorded molds, reasons why they’re absent from books yet exist in reality, scientific analysis, and conservation guidelines — drawing from trusted sources such as Triyampawai, Nirnam, Ajarn Prachum at U-Arun, published Somdej appraisal manuals, expert forums, and recognized online communities.

Historical Creation and Key Creators
Somdet Phra Phutthachan (To Phromrangsi) was a monk whose influence on Thai Buddhism and society remains profound. He served as abbot of Wat Rakang Kositaram during the reigns of Kings Rama IV and V, and was responsible for the creation of the most celebrated Somdej amulets in Thai history — those of Wat Rakang and Wat Bang Khun Prohm.

Early production relied on local artisans — such as Mr. Ted, Somdet To’s grandson — and bronze-casting experts skilled in Buddha image casting. Later, royal court artisans like Somdet Phra Bamrabprapak and a senior palace official contributed to designing square molds and refining the aesthetic form. In the final stages, Luang Wijarn Chianranyai, a royal goldsmith under King Rama IV, became instrumental in carving molds and introducing new materials — notably tangle oil — to prevent cracking and increase structural integrity. His work marked the beginning of the standardized, highly refined Somdej molds now universally admired.

Standard and Sub-Mold Classifications
The primary mold types accepted by collectors and recorded in standard texts include:
- Pim Yai (Large Mold)
- Pim Chedi (Stupa Mold)
- Pim Base Sam (Triple-Base Mold)
- Pim Ges Bua Tum (Lotus Bud Crown Mold)
- Pim Prok Pho (Bodhi Canopy Mold)
- Pim Sia Krut (Kaiser Mold / Eagle Breastplate)
- Pim Sanghati (Wat Bang Khun Prohm Only)
- Pim Sen Dai (Thread Mold — Wat Bang Khun Prohm Only)
- Pim Base Khu (Double Base — Wat Bang Khun Prohm Only)
Each main mold has numerous sub-variations — such as Pim Kheng (raised), Prong (open), Chalud (slanted), Pom (bulky), San Tat (ridged), Yom (curved) — resulting from hand-carved molds and multiple mold sets used across different eras. Triyampawai classified nine standard molds: six from Wat Rakang, three from Wat Bang Khun Prohm — Sanghati, Sen Dai, and Base Khu.

Rare Molds: Meaning, Characteristics, and Status in the Field
“Rare Mold” refers to Somdej amulets whose form diverges from standard molds accepted by the collector community. These may stem from locally carved molds, experimental prototypes, or short-lived production runs — often in very limited quantities. They frequently exhibit asymmetrical arches, tilted figures, incomplete bases, irregular sizing, or unusual details not found in popular molds — yet they exist, verifiable through material composition, surface texture, mold defects, and scientific analysis.

Why aren’t these recorded in books? Key reasons include:
- Created from locally carved molds — few in number, not widely distributed
- Prototypes or test molds never put into continuous production
- Books focus on widely accepted, popular molds
- Some molds were discontinued or only found in specific excavation sites
Nevertheless, these rare molds do exist — confirmed by experts, seasoned collectors, and verified finds in auction houses and online markets.
Examples of Rare Molds and Evidence of Their Existence
Examples include ancient powdered-clay Somdej amulets with unusual molds, dry texture, once auctioned on major amulet websites and authenticated as genuine creations by Phra Supatipanno — or Wat Rakang large-mold Somdej containing embedded gold particles, exceedingly rare and held by descendants of high-ranking nobility from past dynasties.

Molds and Carving Techniques
Early and mid-period Wat Rakang Somdej molds were typically carved from soapstone — harder than wood, allowing finer detail. Royal or court artisans were primarily responsible for these. For Wat Bang Khun Prohm, especially during mass-production periods, wooden molds — such as teak or rosewood — were favored for speed and ease, though yielding less precision.
Soapstone molds from the Rama IV–V era exhibit exquisite craftsmanship rarely matched today. Many surviving soapstone molds remain in the possession of descendants of royal artisans within the Department of Ten Crafts.
Soapstone molds produce sharp, defined edges — with the left arch touching the frame at the Buddha’s left elbow. Wooden molds from Wat Bang Khun Prohm often result in protruding edges on the front face and smooth backs — due to differing pressing techniques between the two temples.
Sacred Materials and Core Ingredients
Materials used in Wat Rakang and Wat Bang Khun Prohm Somdej fall into three categories:
- Structural & Binding Materials: Lime from burnt seashells, cooked rice, banana pulp, tangle oil, fine white sand
- Spiritual Powders: Five Sacred Powders (Phong Pathamang, Phong Ittijee, Phong Maharat, Phong Phutthakhun, Phong Trinisingha), burnt palm leaf powder
- Auspicious Additives: Flower pollen, 108 herbs, silver/gold sand, sandalwood oil, incense ash
Additionally, “Phra That” grains (small yellowish-white stones) and tangle oil were mixed in — unique to Wat Rakang. Phra That grains strengthen the clay body and serve as key authenticity markers. Tangle oil binds the mixture, preventing long-term cracking.
Physical Characteristics of Somdej Clay
Somdej clay varies depending on ingredient ratios:
- Pollen Clay: Soft, ivory-colored
- Sandalwood Clay: Soft, olive-green or pomegranate hue
- Soft Lime Clay: Soft, blue-gray or dried pomegranate tone
- Kraya Sarat Clay: Soft or firm, light chocolate or dried pomegranate
- Khanom Tub Tub Clay: Firm, earth-brown or ash-gray
- Hard Lime Clay: Firm, fresh ivory or milky white
Production Process: Pressing, Trimming, and Edge Formation
The creation process includes:
- Material Preparation: Mixing and pounding ingredients per formula
- Molding: Forming clay into appropriate-sized balls
- Pressing: Placing clay onto mold (soapstone or wood) and pressing by hand or board
- Trimming: Cutting excess clay along mold frame
- Drying: Air-drying before storage or distribution
Protruding edges (“Khon Plin”) occur when clay overflows the mold — common with wooden molds from Wat Bang Khun Prohm. “Puu Tai” lines — small cracks resembling crab tracks — form from shrinkage or hand-pressing, characteristic of genuine Wat Rakang and Wat Bang Khun Prohm Somdej.

Authentication Methods and Mold-Specific Defects
Authenticating Somdej requires understanding mold shape, materials, age, and mold defects. Key approaches:
- Mold Shape: Study standard molds from books or reputable sites. Genuine pieces show natural, unaltered details — no filling or repair. Fake pieces often have warped or missing features.
- Material: Authentic pieces show natural aging — black patina, excavation crust, clay shrinkage. Fakes appear overly clean, lacking depth or texture.
- Age: True antiques (decades or centuries old) must show authentic aging — crust, dirt, rust, lime deposits, lacquer stains.
- Natural Imperfections: Handmade or ancient-mold pieces show artistic imperfections — slight warping, uneven surfaces — but retain vitality. Machine-made fakes are unnaturally sharp or flawless.
- Tools: Use 10x–20x magnification to spot shrinkage lines, Puu Tai cracks, mineral grains, rust spots.

Somdej Long Rak Chart Pim Gaes Talu Sum Block Chang Luang Wijarn – Somdej Dto Wat Rakang
Specific Mold Defects and Observable Traits
Key mold defects and traits for authentication:
- Khon Plin (Protruding Edges): From overflow during pressing
- Fingerprints: From hand-pressing
- Cracked Mold Lines: From damaged molds
- Puu Tai Lines: Tiny crack lines resembling crab tracks
- Phra That Grains: Small round dots on surface
- Shrinkage Marks: From clay contraction
- Excavation Crust: Surface buildup from burial
- Needle Pores: Tiny holes from shrinkage
- Worm Tracks: Curved lines resembling worm trails
- Water Lily Wrinkles: Fine wrinkles on surface
- Palm Leaf Cracks: Long cracks resembling leaf veins
- Coconut Milk Cracks: Linear cracks resembling coconut milk dessert
- Fingerprint Lines: Visible fingerprints on surface
- Crackled Earth Lines: Tiny cracks resembling dried soil

Scientific and Forensic Analysis
Scientific analysis plays a crucial role in verifying authenticity and age. Techniques include:
- Acid Reaction Test: Acetic acid reacts with calcium carbonate — CO₂ bubbles indicate age level
- X-Ray Fluorescence Spectrometry (XRF): Measures calcium carbonate content
- Scanning Electron Microscopy (SEM): Analyzes crystal structure and chemical composition
- 10x–20x Magnification: Observes surface and clay texture for mold defects and aging
- Material Structure Analysis: Assesses degradation patterns and component makeup
Age Assessment Table Using Acid Reaction
| Bubble Characteristic | Bubble Size (mm) | Age Estimate |
| No bubbles | — | Not lime — possibly resin |
| Small, clinging bubbles | X ≤ 0.1 | New amulet |
| Small, fast-rising bubbles | X ≤ 0.1 | Several decades old |
| Mixed small-large bubbles rising slowly | 0.1 ≤ X ≤ 0.5 | Over 100 years old |
| Large, slow-rising bubbles lingering in droplet | 0.3 ≤ X ≤ 0.5 | Over 150 years old |

Micro Chipped Certificate of 3rd Prize Pra Somdej Bang Khun Prohm Pim Sen Daay Kru Gao
Combining these techniques with mold and material analysis enhances accuracy in academic and forensic authentication.

Photography and Documentation Standards for Research
For research-grade photography:
- Use macro mode or 10x/20x lens for fine detail
- Use tripod and stable platform to prevent shake
- Light with cool daylight lamps (minimum two) for even illumination
- Use black velvet or glass backdrop to highlight subject
- Capture multiple angles — front, back, sides, close-ups of mold defects
- Use Photoshop or apps to adjust background
- Perform reverse image search against known authentic databases

Conservation, Cleaning, and Storage Guidelines
Powdered-clay Somdej require careful handling to preserve original condition and historical value:
- Avoid washing with water or harsh chemicals — may alter surface or cause unwanted staining
- Use soft brush or cotton swab to gently remove dust and crust
- For mold or termite damage, brush gently, wrap in tissue paper, and store in rice container for 2 nights to absorb moisture
- Avoid toothbrushes, pot scrubbers, or Scotch-Brite — may damage surface
- Store in dry, temperature-controlled environment — avoid direct sunlight

Legends and Anecdotes Related to Rare Molds and Somdej Creation
Legends surrounding Somdej creation abound — such as mixing crushed Khmer-era amulets from Kamphaeng Phet into the sacred powder, using five sacred powders processed through five stages, or consecrating with the Chinbanchorn mantra received by Somdet To from Kamphaeng Phet. These reflect deep faith in Somdet To’s spiritual authority and societal impact.
Stories about rare molds — such as locals carving their own molds or creating short-run experimental pieces — explain why these molds are scarce and unrecorded, yet verified by experts and found in auctions and field discoveries.

Historical and Community-Based Analysis: Why Rare Molds Are Unrecorded Yet Real
Somdej creation was an evolving art — transitioning from village artisans to royal craftsmen and court goldsmiths. Hand-carved molds and multiple mold sets across eras led to diverse forms, including rare molds. These often resulted from experimentation, local carving, or temporary design adjustments — hence limited quantity and lack of widespread distribution. Books prioritize popular, broadly accepted molds — leaving rare variants undocumented yet genuinely present in the market and online auctions.
Known Collections, Museums, and Major Holders of Rare Molds
Documentation of museum collections holding rare Somdej molds is limited. However, major holders include descendants of high-ranking nobility — such as those possessing Wat Rakang large-mold Somdej with embedded gold particles, extremely rare and valuable today.

Auction Records and Market Value of Rare Molds
Rare, authenticated Wat Rakang and Wat Bang Khun Prohm Somdej molds command high auction prices. Examples:
- Wat Rakang large-mold Somdej with gold particles — auctioned for 60–150 million THB
- Wat Rakang large-mold, crown piercing arch, shell-lime clay — starting bid 51,000 CNY (~230,000 THB)
The Thai amulet market circulates over 40 billion THB annually — with Wat Rakang and Wat Bang Khun Prohm Somdej, both standard and rare molds, leading in collector demand.
Case Studies: Masterpieces and Verified Rare Molds
Examples of accepted rare molds:
- Wat Rakang large-mold, golden-sand clay — or with embedded gold particles — verified by experts despite absence in standard texts, held by private collectors, commanding high auction values
- Ancient powdered-clay Somdej with unusual molds, auctioned online and authenticated as genuine creations by Phra Supatipanno

Trusted Literature and Sources
Accepted Somdej reference texts:
- Traiyanphawai’s “Somdej Appraisal Manual”: Covers Somdet To’s biography, creation legends, materials, clay types, molds, consecration, detailed comparisons, and cleaning methods
- Nirnam of Precious Magazine: In-depth on materials, Phra That grains, tangle oil, and authentication
- Ajarn Prachum, U-Arun: Senior expert offering insights into rare molds and artistic evaluation
Also trusted: Thaprachan, Tha Phra Chan, and especially in the present day the Thai Amulet Association of Siam, who are specially dedicated to expertise in Pra Somdej.

Experts, Collectors, Forums, and Trusted Online Communities
Recognized experts and collectors:
- Triyampawai, Nirnam, Ajarn Prachum, U-Arun
- Ajarn Pakit Limskul (Plai Chumphon)
- Associate Professor Rangsarn Toesuwann
Trusted forums and communities: Thaprachan, Tha Phra Chan, specialized Facebook and Line groups — vital for information exchange on rare and standard Somdej molds.
Legal, Ethical, and Academic Publishing Guidelines
Thai amulet trading falls under Civil and Commercial Code, with descriptive warranties guaranteeing authenticity. If proven fake or repaired, buyers may sue for damages or cancel contracts. However, authentication still relies more on expert reputation than legal mechanisms.

Phra Somdej Wat Rakhang Kes Talu Sum
Ethically, publishing amulet information should align with Dhamma principles — avoiding claims of unprovable magical powers, and ensuring production doesn’t devolve into commercial exploitation rather than public benefit.
Conclusion and Recommendations
Wat Rakang and Wat Bang Khun Prohm Somdej are significant artifacts of Thai religious and cultural history. Their study, particularly the lesser-known and unrecorded molds, reveals the organic nature of their production — shaped by artisans, time, and circumstance. Authentication rests upon a combination of visual inspection, material science, and historical context. Preservation must be undertaken with care, respecting their physical and spiritual integrity.
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