Glazing powder—also known as "brightening powder" or melamine glazing resin—is a powdered raw material produced by reacting formaldehyde with melamine to form a resin, which is subsequently dried and ball-milled. As it contains no pulp (cellulose filler), it is often referred to in the industry as "refined powder." While both glazing powder and melamine molding compounds are polymeric compounds, the former possesses a higher degree of purity and is specifically designed for the surface-glazing post-processing of melamine and urea-formaldehyde molded products. Common grades include LG-110, LG-220, and LG-250, each tailored for specific base materials and decorative processes.

2.2 Key Characteristics

Glazing powder appears as a white, odorless, and tasteless powder that is soluble in water. Composed entirely of pure resin—devoid of fillers like pulp—it forms a dense film. It is thermosetting in nature, curing simultaneously with the surface layer of the product under the heat of the mold. It is non-toxic and complies with requirements for materials intended for food contact.

2.3 Product Advantages

It significantly enhances the surface brightness and smoothness of products, resulting in more aesthetically pleasing tableware. It improves surface density and finish, while also enhancing the product's resistance to thermal/mechanical fatigue and increasing its fracture toughness. Furthermore, it boosts surface wear resistance (reducing the appearance of scratches) and improves stain resistance, ensuring a long-lasting, lustrous finish. It is also highly compatible with decorative techniques such as the application of decals or metallic accents. 2.4 Key Technical Parameters

Table 2: Key Technical Parameters of Glazing Powder

Item Unit Technical Specification

Appearance — White powder

Odor — Odorless

Solubility — Soluble in water

Flowability (Rasching flow) mm 190–210

Volatile Content % ≤4.0

Molding Temperature ℃ Approx. 155 (molding time adjusted as needed)

Model & Application — LG-110: For glazing A1 and A3 materials; LG-220: For glazing A5 materials; LG-250: For decal application (patterned paper)

Applicable Standard — Refers to the GB/T 13454 series (manufacturer specifies compliance with GB13454-92)

Note: Data compiled from publicly available manufacturer information (e.g., Kaihua Ruida Plastics; retrieved October 2026).

2.5 Fields of Application

Surface glazing for melamine and urea-formaldehyde tableware; application of decorative decals (patterned paper); surface decoration processes such as gold-leaf application or hot stamping; and other post-processing applications requiring enhanced surface gloss and durability for imitation-porcelain (melamine-ware) products.

2.6 Precautions

Select the appropriate grade of glazing powder based on the base material of the product: use LG-110 for A1 and A3 materials, LG-220 for A5 materials, and LG-250 for decal application; do not mix or interchange different grades. Store the product in a sealed container in a cool, dry place; protect from moisture and clumping, as exposure to moisture reduces flowability and impairs uniform glazing. When applying, ensure the powder is spread thinly and evenly in an appropriate amount; an excessive layer can lead to surface accumulation and uneven gloss. Maintain a mold temperature of approximately 155°C, with molding time adjusted as required. Ensure the work area is well-ventilated, operators must wear dust masks, and keep the powder away from open flames.