0

Artificial Silver Toning aka Tarnishing Using Anodization

Watch in awe – and you can read more about the anodizing process here.

In this video we show how to use Anodization to give colors to silver coins, also known as toning.

First we mix 200mL of water, 10g of powdered sulfur and 20g of sodium hydroxide and stir for ten minutes or so. This forms a solution of sodium polysulfides.

Then we place in the solution our silver object, in this case a silver coin. We attach the positive terminal of a battery, 1.5 volts is good, to the coin and touch the negative end to solution away from the coin. The silver will get oxidized by the current and form silver sulfide. The layer of silver sulfide imparts color to the coin depending on thickness which is proportional to the time the current is applied.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 8,700+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Spotlight on Makeblock, one of the latest companies to find success in the STEAM market

Wearables — The press of a button

Electronics — Avoid serial confusion!

Biohacking — BDNF a Biohackers Best Friend

Python for Microcontrollers — The Python powered synth is here @circuitpython @micropython @ThePSF #Python

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.