What are the main differences between granite and composite kitchen sinks?
1. Granite sinks, made of PMMA resin mixed with granite particles.
This is a high end kitchen sink. Currently, only a few factories worldwide possess the production technology for PMMA granite sinks, such as BLANCO and SCHOCK in Germany, and NAITRON in China. They are sturdy and durable, with a Mohs hardness of up to 6, far exceeding the 4-5 of stainless steel, making them less prone to scratches from knives and cookware. The raw material contains 80% natural mineral particles and is made by high-temperature pressing of resin, resulting in a very solid structure.
High-temperature and corrosion-resistant: They can withstand direct contact with hot pots up to 280℃ without cracking. The dense, non-porous surface effectively resists acid and alkali corrosion.
Quiet and noise-reducing: The high material density effectively absorbs the impact noise of water flow, far lower than the clanging noise of stainless steel sinks during use.
Stylish and stain-resistant: Features a matte finish, soft touch, and comes in a variety of colors including black, gray, and white to match different styles; extremely low water absorption, resists oil stains, and wipes clean with a single touch.
Excellent antibacterial properties.
2.Quartz sinks are made of unsaturated resin (UPR) mixed with quartz sand.
They resemble best granite sinks in appearance and are cast at room temperature using UPR resin and quartz sand. Their surface hardness reaches 4-5 on the Mohs scale, approaching that of stainless steel. Daily use requires caution, as the surface may be scratched by stainless steel or other materials. Light-colored surfaces easily attract dark stains, which may lead to staining if not cleaned promptly.
Quality varies: Lower-priced products may exhibit problems such as easy discoloration and surface limescale residue.
3.Fiberglass Sinks: Made of fiberglass-reinforced unsaturated resin mixed with stone powder.
The product uses a thermosetting high-pressure molding process. It is lightweight and high-strength, able to withstand the impacts of daily kitchen use without breaking.
It has good hot water resistance, stable color, and will not discolor over long-term use.
Excellent dimensional stability: It will not deform even after long-term use.
Good heat resistance: The heat distortion temperature is as high as 200-280℃.
Nano-treated surface: Easy to clean, non-stick to oil stains, and has good stain resistance and self-cleaning ability.
The surface hardness can reach Mohs 4-5, close to the hardness of stainless steel. Daily use requires caution, as the surface may be scratched by stainless steel or other materials.
In summary, if you have purchased a composite kitchen sink, do not use steel wool or other hard objects to scrub it, as this may damage the surface gloss. Soaking salty foods in the sink for a long time may corrode and damage the resin material. Develop a habit of wiping it clean after use; stubborn stains can be removed with a neutral detergent and a soft cloth.