Heated Multi-Etch

We recommend using your Multi-Etch heated because it’s MUCH faster.

Your first order will come in a jug with the Multi-Etch powder at the bottom. This container can be used to dissolve and mix your Multi-Etch for your first and future orders. Store and use Multi-Etch in plastic containers, never in metal or glass.

Subsequent orders will come in a bag with just the Multi-Etch Powder. Because the ingredients are not blended, you must mix the entire package.

Potential anodizing lab set-up. Lab set-up features a double boiler beneath a fume hood, jug of Multi-Etch, a rinse bowl, cleaning solution, anodizing machine next to anodizing bath, bowl for anodizing rinse and a storage tank marked for de-ionized or distilled water.

Chris Boothe wearing safety goggles, safety gloves, and a lab coat.

Step 1:

Set up your etching equipment near your fume hood. Possible set-up is outlined in the above picture and alternative simple double boilers are shown below. Once the set up is complete, you can put on your protective gear: Safety goggles, gloves and a lab coat!

Simple double boilers: for the inner container that holds the Multi-Etch, use plastics marked 5 or sometimes 7 that can withstand the heat. The outer container that just holds water can be made of metal or ceramic. But NEVER USE METAL OR GLASS FOR THE INNER CONTAINER THAT HOLDS THE MULTI-ETCH because metal and glass will both etch slowly and the glass will eventually break.

Inner containers made of plastics marked 5 or 7 should be OK sitting right on the bottom of the outer container but if you want to be extra cautious, line the bottom of the outer container with pebbles or some kind of baffling screen.

Crock-pot with plastic container placed inside for a double-boiler set-up.

Simple Double Boilers

A metal bowl with rocks in the bottom placed on a heating unit. A plastic container in placed in the middle of the bowl to create a double boiler.
Side view of double boiler made with metal container, plastic container and hot plate.

Black funnel placed on table with skinny end facing up.
Jug labeled “Distilled Water”

Step 2:

Prepare your Multi-Etch for use. Add water with the help of a funnel - For regular strength, you will add one gallon of de-ionized or distilled water; for double strength, add 1/2 gallon. Shake vigorously and leave overnight, or, if using sooner, shake again right before use.

Step 3:

At this stage turn on your fume hood. Pour into a double boiler only as much Multi-Etch as you need for this session, keeping the rest capped in the bottle. Heat until you see fine bubbles, or the temperature of Multi-Etch is 125-150ºF.

While waiting for the Multi-Etch solution to reach desired temperature, clean your titanium parts with Simple Green.

Double boiler placed beneath a fume hood in laboratory.

Anodizing machine set-up next to a bucket of clear liquid labeled anodizing bath.

Step 4:

Swish or swirl your titanium pieces in Multi-Etch for 7-10 seconds. If your holder will touch the heated Multi-Etch, make sure it’s made of plastic, titanium, or niobium.

Rinse in distilled or de-ionized water.

Anodize right away or store in distilled or de-ionized water to prevent re-formation of the natural oxide layer.

For more information please check out our resource videos!

We hope these steps helped you use our amazing product! If you had any issues please check out our Frequently Asked Questions or feel free to email us at Info@ReactiveMetals.com or Info@MultiEtch.com with any concerns.