Non traditional jewelry for Non traditional people – The rings tell the story

Lost Wax Techniques for Jewelry Designers, Hobbyist and Artists. Tips and Notes.

Setting up the Wax Tree

The sprue is the central wax post that keeps connected all the models; it is inserted at the entrance of the flask base. See illustration.

The bigger pieces are setting closer to the base.

Allow at least ½ “ between flask wall and pieces inside.

Calculating Silver Weight

Wax Weight= W.  Weight of wax sprue+ wax models.

Base Weight=B

Total Weight=TW. Base +Wax Weight.

TW-B = W

At this step we are calculating the Wax Tree Weight.

W x 10 = SW

The conversion factor from wax to Silver is the weight of wax times 10.

The Extra 10 to 12 dwt is added to cover the button weight. The button is the cavity of the dome that remains at the flask base and attached to the main sprue. See illustration

Investment Preparation

The proportion of water related to investment powder is about 3.5 to 4 parts of water by 1 part of investment. It is highly recommend to experiment with these proportions. The investment avidity for water could vary by brands and manufacturers.

Tip: The density of the investment mixture affects the surface of metal models (gold, silver, brass, etc. ) In other words, a lesser density makes smoother surfaces.

The Oven and Flask Temperatures

Tip: At the final oven stage we lowered temperature under the sterling silver melting point, avoiding a conflict of temperatures inside the flasks at the time we pour the metal inside it.

sprue,flask,wax models,sterling silver casting

Casting Flask Diagram


One response

  1. Coco

    Very Detailed, good job!

    April 30, 2013 at 2:35 pm

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