# Rainbow Discoloration on Stainless Steel Cookware

> Rainbow discoloration heat tint on stainless steel is a normal harmless cosmetic effect caused by heat exposure  it doesnt affect cooking performance or fo

Source: https://support.hestanculinary.com/en_us/rainbow-discoloration-stainless-steel-cookware-ry1hIuIRbl

Last updated: 2026-05-04T20:26:52.907Z

## What You're Seeing — and Why It Happens

The rainbow discoloration on your stainless steel cookware is called **heat tint**. It develops when the metal reaches high temperatures, forming a thin oxide layer on the surface — producing those iridescent blue, gold, and purple hues.

It is entirely cosmetic. Your cookware's cooking performance is unaffected, and it remains completely safe for food contact.

## A Natural Characteristic of Performance Cookware

Hestan's stainless steel collections — including **NanoBond titanium**, **ProBond**, and **CopperBond** — are engineered for professional-grade performance. High heat is part of the territory. Heat tint is a natural result of working stainless steel at its full potential, not a flaw in craftsmanship or materials.

## How to Remove Heat Tint

With the right approach, heat tint is straightforward to address at home.

**What you'll need:**

*   Bar Keepers Friend (powder or liquid)
*   A damp cloth or soft sponge
*   Water for rinsing

**Steps:**

1.  Apply a small amount of Bar Keepers Friend to a damp cloth or soft sponge.
2.  Rub gently in the direction of the grain — never in circles.
3.  Rinse thoroughly with water.

For light discoloration, white vinegar diluted with water is a gentler alternative worth trying first.

## What to Avoid

Protect your cookware's polished finish by steering clear of:

*   Steel wool
*   Abrasive scrubbing pads
*   Harsh chemical cleaners

These can scratch the surface and permanently dull the finish.

## Warranty Information

Heat tint is a natural characteristic of stainless cookware and is not covered under warranty. It does not indicate a defect in materials or workmanship.