1. Sigma Plaster – The Optimal Solution for Intricate Castings

1.1 Overview of Sigma – Designed for Thin and Detailed Castings

Sigma is one of the premium products from Certus, a brand backed by over 50 years of expertise in developing and manufacturing casting plasters. Driven by the philosophy "Exceeding Every Industry Standard", Certus continuously innovates in quality and technology while offering dedicated technical support to help customers achieve optimal results.

Sigma plaster is specially formulated for casting highly detailed, thin, and sharp-edged products such as silver jewelry, brass pieces, resin models, or artistic sculptures. Unlike standard plasters, Sigma combines all the necessary properties to deliver smooth, burr-free, and flawless castings.

1.2 Product Specifications

• Product name: SIGMA Casting Plaster

• Packaging: 50lbs (22.5 kg) per bag

• Mixing ratio: 380 – 420 ml water per 1 kg of plaster (depending on model thickness)

• Applications: Casting silver, brass, resin, wax

• Origin: Certus – USA

2. Advantages of Sigma Plaster

2.1 Ultra-Smooth Surfaces – Crisp, Fine Details

SIGMA uses the purest raw materials combined with high-grade, demineralized cristobalite imported from the USA. This unique formulation produces molds that reproduce even the finest surface details—making it ideal for intricate jewelry designs, small decorative features, and high-art pieces.

2.2 Easily Eliminates Air Bubbles and Water Marks

Air bubbles and water streaks are common issues during mold creation, directly impacting the surface quality of cast products. Sigma addresses this with a proprietary air-control chemical that effectively removes trapped air from the mixture. You can use traditional mixing methods and still achieve exceptional mold quality.

2.3 Superior Thermal Shock Resistance – No Cracking or Breakage

High-temperature firing often causes many plasters to crack, burn out quickly, or deform—especially when casting with wax or resin materials that vaporize at different rates. Sigma is formulated for outstanding thermal shock resistance, maintaining mold integrity throughout the burnout and metal-pouring process. This is a huge advantage for professional foundries.

2.4 User-Friendly Formula – Easy to Mix and Apply

Not everyone is a casting expert. With Sigma, even beginners can achieve professional-level results. Its friendly formula and clearly defined mixing ratio (380–420 ml water per 1 kg of plaster) make it easy to adjust for varying mold thicknesses, reducing risk and boosting productivity.

3. Applications of Sigma Plaster

Sigma is not limited to the jewelry industry. Thanks to its ultra-fine casting ability, detail precision, and high thermal resistance, it is also used in a wide range of applications such as:

• Casting small statues or detailed artistic models

• Producing high-end handicrafts

• Creating small mechanical components requiring precision surfaces

• Manufacturing resin, epoxy jewelry, and high-quality handmade items

4. Why Choose Sigma Over Conventional Plasters?

If you're currently using generic plaster to cast thin, detailed, or high-value items, upgrading to Sigma offers immediate benefits:

• Save time by avoiding post-cast defect corrections like burrs or surface flaws

• Reduce material costs with higher yield and fewer rejects

• Lower risk of casting failures due to mold cracking or burnout

• Increase final product quality – the most critical factor in handcrafted and jewelry work

Achieving a flawless, detailed, and smooth casting isn’t just about craftsmanship—it heavily depends on mold material quality. Sigma is more than just a plaster; it is a complete solution designed to eliminate the everyday casting problems faced by artisans and foundries.

If you’re looking for a high-standard, easy-to-use casting plaster that delivers perfect results even without perfect technique, Sigma is the choice you can’t afford to miss.

5. DC Technologies – Official Supplier of Sigma and Complete Casting Material Solutions

DC Technologies is proud to be the official distributor of Sigma 50lbs plaster and other high-quality specialized casting plasters. We cater to a wide variety of needs in the jewelry, fine arts, and technical modeling industries. Our commitment is to provide genuine products, consistent quality, and dedicated technical consulting to help you choose the right plaster for each specific application.

If you need further information or technical support, don’t hesitate to contact DC Technologies. We are always ready to provide optimal solutions to help you improve both product quality and production efficiency.