Tech glossary

The spec-sheet jargon, decoded. 28 terms explained in plain English so you know exactly what you’re paying for.

Air Fryers

Rapid Air Technology: The marketing name for the fan-and-heater system in an air fryer that circulates very hot air to crisp food with little or no oil. It is essentially compact convection cooking, not true deep frying.

Auto cut-off: A safety feature that switches an appliance off automatically once a task is done, such as an electric kettle turning off when the water boils. It prevents overheating and saves energy.
Boil-dry protection: A safeguard in electric kettles that cuts power if the kettle is switched on with little or no water inside. It stops the element from burning out and is a must-have safety spec.

Ceramic coating: A mineral-based non-stick layer marketed as a PTFE alternative. It looks great and is metal-utensil tolerant to a point, but the non-stick effect usually fades faster than good PTFE, so set expectations accordingly.
Non-stick: A coated cooking surface that lets food release easily and needs less oil, ideal for dosas, omelettes and low-fat cooking. Its lifespan depends on the coating quality and on using wooden or silicone utensils rather than metal.
PFOA-free: Means the non-stick coating was made without perfluorooctanoic acid, a processing chemical now phased out over health concerns. Almost all reputable Indian cookware is PFOA-free today, so treat it as a baseline, not a premium feature.
PTFE / Teflon: Polytetrafluoroethylene, the slippery synthetic coating that makes a pan non-stick. It is safe for everyday cooking but starts to break down above roughly 260°C, so avoid empty preheating on high flame.
Triply / 5-ply: Cookware built from bonded layers, typically stainless steel outside and inside with an aluminium or copper core for even heat. Triply is durable, non-reactive and induction-friendly, making it a long-term buy despite the higher price.

Copper-bottom: A layer of copper bonded to the base of a vessel to spread heat quickly and evenly. Common on stainless-steel cookware and traditional bottoms, it improves heat response but needs occasional polishing to stay bright.
Dishwasher-safe: Means a product can withstand the heat, detergent and water pressure of a dishwasher without warping, fading or losing its coating. Many non-stick and hard-anodized items are not dishwasher-safe, so verify before assuming.
ISI / BIS mark: The certification of the Bureau of Indian Standards, shown as the ISI mark, confirming a product meets Indian safety norms. It is mandatory for electrical appliances like mixers and kettles, so always check for it before buying.
Stainless steel 304 (18/8): Food-grade stainless steel containing 18% chromium and 8% nickel, giving strong corrosion and stain resistance. It is the gold standard for lunch boxes, storage and cookware because it is non-reactive and does not leach into food.
Wattage (W): A measure of how much electrical power an appliance draws, indicating its heating or motor strength. Higher wattage generally means faster cooking or tougher grinding, but also a bigger load on your 230V connection.

Induction-compatible: Cookware with a flat, magnetic (usually ferromagnetic steel or iron) base that an induction cooktop can heat. Pure aluminium, copper or glass will not work unless they have a bonded magnetic base plate.

Hard-anodized: Aluminium that has been electro-chemically hardened into a dark, scratch-resistant and non-reactive surface. It heats evenly, lasts far longer than plain aluminium, and suits Indian gravies and deep frying, though most hard-anodized pieces are hand-wash only.

Leakproof: A lunch box or bottle design, typically with a silicone-lined locking lid, that will not spill liquids even when tilted or shaken in a bag. It is the single most important feature for carrying dal, sambar or curries to office or school.

Overload protection: A built-in cut-off that shuts the motor down if it overheats or jams, protecting a mixer grinder from burning out. Look for a resettable trip button, which is common on Indian mixers used for heavy grinding.
RPM: Revolutions per minute, how fast a mixer grinder or blender blade spins. Higher RPM helps with fine chutneys and smoothies, but sustained torque under load matters more than peak RPM for tough Indian tasks like idli batter.

Convection: A cooking mode that uses a fan to circulate hot air so food browns and bakes evenly, letting an oven or microwave roast, grill and bake like a conventional oven. Essential if you want to bake cakes or make tandoori-style dishes at home.
Microwave-safe: Means a container or cookware will not melt, crack or release harmful substances when heated in a microwave. Metal is never microwave-safe; look for the symbol on plastics and glass before reheating.
OTG: Oven Toaster Griller, a compact electric oven with heating coils that bakes, toasts and grills but cannot reheat like a microwave. It is the budget-friendly choice for serious home bakers in India.

Gasket / sealing ring: The rubber or silicone ring inside a pressure cooker lid that seals it so steam can build up. It wears out and hardens over time, so replacing it every year or two is normal maintenance for safe cooking.
Inner-lid vs Outer-lid: Two pressure-cooker designs: inner-lid cookers seal from inside the rim and are considered safer and better for smaller families, while outer-lid cookers close over the top and make it easier to fit large or stackable containers.

Airtight: A seal, usually a silicone gasket with a locking lid, that keeps air and moisture out. It keeps atta, biscuits, tea and masalas fresh and crisp, which is especially valuable during the Indian monsoon.
Borosilicate glass: A heat-resistant glass that can handle sudden temperature changes without cracking, so it moves safely from fridge to microwave to oven. It is ideal for storage jars and bakeware, though heavier and pricier than plastic.
BPA-free: Means the plastic is made without bisphenol-A, a compound linked to health concerns that can leach from certain plastics. Choose BPA-free for any container, bottle or lunch box that holds hot or acidic food.

Cast iron: Heavy, naturally non-stick-when-seasoned iron cookware prized for high heat retention and iron enrichment in food. It needs seasoning and careful drying to prevent rust, which matters in humid and coastal parts of India.
Concave tawa: A tawa with a slight inward curve, ideal for phulkas and rotis because the shape helps them puff and lets a little oil pool at the centre. Flat tawas, by contrast, are better suited to dosas and uttapams.

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