If I use it on a sterling silver ring will the darkness last or will it wear off?

I don't know how it reacts with silver but I just put this on a copper stove hood and I can honestly say it will never come off without acid and some major scrubbing. The best tips I can give you are, make sure you use hot water (I used boiling) and to mix this outside, this stuff is potent. For a ring I would boil a cup of water and put a very small piece in and stir it until it dissolves. Dip the ring and see if it's dark enough. If not, add another small piece until it's the correct shade. Good luck.

What is the ratio to water, how much will this make, or how many square inches of metal can it treat?

Don’t remember the ratio I used but I know I tried many ways to make it work and it didn’t work for me- I hope u have better luck than I did

Would this stain a bathtub?

Sorry, I don't know. I bought it to turn copper black since it chemically reacts with copper. I don't think it would react with the porcelain of a bathtub, but it still might stain it.

Would this work to turn brass dark brown or black? Thanks!

It will work on brass if the brass is hot and you have made fresh, hot liver of sulfur.

Liver Of Sulfur 4 Ounce Jar Sol 600 04

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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137.52 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Transform your metals, transform your style.

EFFORTLESS OXIDATION - Just dissolve lumps in hot water for a flawless black patina every time.
GENEROUS 4 OZ SUPPLY - Wide-mouth jar ensures easy handling and long-lasting use.
SAFE NON HAZARDOUS - Work confidently with a formula that’s gentle yet powerful.
TRUSTED CRAFTSMANSHIP - Eurotool’s classic formula, loved by pros and hobbyists alike.
VERSATILE METAL MAGIC - Perfect for silver, copper, and wire components—elevate your jewelry game.

Liver of Sulfur by Eurotool is a 4-ounce jar of lump-form oxidizer designed to create a durable black patina on silver, copper, and other metals. Simply dissolve in hot water for quick activation. Non-hazardous and easy to use, it’s a trusted choice for jewelry makers seeking professional-grade oxidation effects.

Specifications

ASIN	B0058ECYUC
ASIN	B0058ECYUC
Best Sellers Rank	#63,073 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #413 in Canning Jars
Brand Name	EUROTOOL
Customer Reviews	4.6 4.6 out of 5 stars (334)
Date First Available	June 27, 2011
Is Discontinued By Manufacturer	No
Item model number	SOL-600.04
Manufacturer	Eurotool
Manufacturer	Eurotool
Model Number	SOL-600.04
Part Number	SOL-600.04
Product Dimensions	3.3 x 2.9 x 2.9 inches; 4.97 ounces
UPC	654207209027
Volume	120 Milliliters

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