Kitchen
Cookware, knives and countertop appliances. Unlike air and water, these are not decided by ratings — they are decided by materials and mechanism. How a metal moves heat, how a steel trades hardness against toughness, what a machine is physically doing to the food.
Three categories
Cookware & Bakeware
Conductivity, thermal mass and coatings
Knives & Kitchen Tools
Steel, hardness, grind and sharpening
Small Kitchen Appliances
Mechanism over wattage
Four numbers worth knowing
| Property | Why it decides the outcome |
|---|---|
| Thermal conductivity | Copper ~400 W/m·K against stainless ~16. That 25× ratio is why almost every good stainless pan has an aluminum or copper core. |
| Thermal mass | Decides whether the pan holds its temperature when cold food hits it. The difference between searing and steaming. |
| Rockwell hardness (HRC) | European kitchen steels sit at 56–58, Japanese at 60+. Harder holds an edge longer and chips more readily. |
| PTFE decomposition | Fumes from about 260 °C (500 °F), decomposition at 400 °C (752 °F). Only an empty pan gets there. |
Cookware and bakeware
Two properties explain the whole category: how fast a material conducts heat sideways, and how much heat it stores. Every argument about pans is really an argument about where a material sits on those two axes.
- Cookware materials explained — choosing pans by how they move heat
- Stainless steel cookware — what tri-ply and 18/10 really tell you
- Cast iron vs carbon steel — thermal mass, weight and seasoning
- Nonstick and PTFE — the temperature limits that actually matter
- Ceramic and sol-gel coatings — what they are and how they fail
- Will it work on induction? — the ferromagnetic base test
- Which pans you actually need — a kit built by cooking task
- FDA’s lead warning — imported aluminum and brass cookware
Knives and kitchen tools
Steel gets the attention and decides the least about whether you enjoy using a knife. Geometry, edge angle and how it sits in your hand decide more — and keeping it sharp decides more than all of them.
- How to choose a kitchen knife — grind, geometry, handle and fit
- Knife steel explained — carbon, stainless, HRC and edge retention
- Whetstones, pull-throughs and honing rods — what each does to an edge
Small kitchen appliances
Countertop machines are sold on wattage and preset counts, neither of which predicts performance. What matters is the mechanism and the one specification that constrains it.
- Air fryers explained — why basket area matters more than quarts
- Blender specifications — jar geometry, torque and serviceability
- Choosing a coffee grinder — burr geometry, retention and consistency
The other half of the site
The home air and water cluster works from published standards instead — AHAM, ASHRAE, NSF and the federal rules that define what a rating means.