We've had the black Blanco sink for 5 years now and have not had a single issue with it, other than it doesn't wash dishes by itself. Personally, if you're going composite, I'd look at colors other than white. They have lighter grays and taupes and darker browns that would look great depending on your color scheme.

The Blanco Silgranit sinks in the non-white colors are super durable. I have had them in two different kitchens, always the Super Single and always in the anthracite color which is a rich black. It's easy care and shows nothing.

I do not recommend the Granite composite white sinks. That's because I love my Silgranit anthracite sinks so much, I recommended it to my friend. She heard my enthusiasm, and bought one for her kitchen, but she bought it in the white color. She finds it very hard to keep looking clean. She showed me how easily the white stains from coffee and wine, and also how difficult it is to keep looking clean and get those stains out. I feel terribly guilty. I had no idea the white color would behave so differently from the anthracite. After seeing first-hand my friend demonstrate the easy staining and the difficult cleaning of the white color, I cannot recommend it. I would absolutely though buy another in anthracite without hesitation.

"Which material (granite, quartz, granite composite) has highest temperature resistance? thank you"

"Granite" sinks are really "quartz" sinks. They are essentially Corian sinks with quartz as the filler instead of aluminum tryhydrate. The only granite sinks are carved out a solid block of stone or are assembled from slabs. Neither would have the heat resistance of stainless steel.

I'm not seeing the point of needing a heat resistant sink. You could probably fry an egg on the hood of your black car in the summertime, but it is not a practice recommended by Ford.

Soapstone is the only material that is heat resistant.

Soapstone is not exempted from the Marble Institute of America's instructions on using trivets to protect stone from heat.

I was excited about Silgranit durability and ordered a white Blanco single bowl sink for our remodel. When it came in, it wasn't white white, it was more of an off-white, and the composite material has a lot of little speckles of darker colors (brown and black kind of). I think this would be less noticeable in a darker color though. I was hoping for for a pure white sink, and this wasn't it. We returned it for a 32" Kraus stainless sink.