Marble Annealing Oven

The use of uranium oxide gives marbles an eerie greenish yellow cast.

Marble annealing oven.

A green marble has been injected with glass containing iron oxide. If you are currently purchasing from another supplier just because they have a better kiln price call us. Marble collecting may be coast to coast but marble collectors stay in touch frequently. My annealer is a small kiln with a computerized control that i made using a commodore 64 computer with my own programming and some home brew circuitry.

The word travels fast in the marble collecting community. Let us pick giraffe bone scales hand pick see all giraffe bone scales hand pick approximate minimum size 1 2 x 3. A 3 4 inch to 1 inch thickness is best. Skutt scarab micro glass master 33 12 w x 7 5 h x 9 25 d.

The speed and force of the injection determines the final design of the marble. Sort filter. Preheat your oven to around 200 degrees celsius. I stumbled across the box of them i had as a kid and subsequently organised them by colour.

Annealing kilns for lampwork glass flameworking. Fahrenheit so they don. Wait 20 minutes roughly you may find you need longer or less time depending on your oven. Heat treating kilns for hardening your blade with maximum efficiency.

When metal is hardened and you need to make it soft again so that you can do something like machine it you need to anneal it annealing is a heat treat proc. And manganese will yield a purple one. For boro annealing use the longer bar. It is best to purchase marble that has already been prepared for baking purposes such as those found at a chef s supply store.

Here is the newly finished marble just before closing it up in the annealing oven. Put marbles into oven. In most instances we can match the price. A means of tempering a hand made glass marble to reduce its brittle nature and give it added strength once completed the marble is placed in an annealing oven where its temperature is reduced slowly over a 24 hour period to room temperature the removal of differential thermal stress machine made glass marbles are not annealed.

Cobalt results in a blue marble. Simply take your standard every day kids playing marble. Make sure the marble baking stone is not too large for your oven. Do not use marble tiles commonly used for floors or countertops for baking.

Trip s again in and out of the glory hole before being cut off w marble shear s or a knife then placed into an annealing oven for several hour s at i believe about 780 deg. There are two aluminum heat control bars one that comes with this new annealer for use with soft glass and the other sold separately below that is used for annealing boro glass.