Jewellery Tools UK — Hand Tools for Jewellers & Silversmiths

Investment Mixing Bowl — Flexible Black Rubber, 4" × 5", Lost-Wax Casting & Dental Lab

Investment Mixing Bowl — Flexible Black Rubber, 4" × 5", Lost-Wax Casting & - Main image
$9.61 $12.99 In stock

Category: Jewellery Making Tools

A flexible bowl for mixing investment ahead of a lost-wax pour. Because the rubber walls give under hand pressure, you can squeeze the sides to work trapped air out of the slurry before it goes anywhere near the flask — a denser mix, and crisper detail on the finished casting. The same qualities serve dental technicians preparing moulds for crowns, bridges and other prosthetics.

The interior is smooth, so cured investment releases cleanly and washing out takes moments, while the flat base keeps the bowl planted as you stir. The deep black colour gives useful contrast against pale investment powders when judging the mix. At 4" × 5", it holds sensible volumes for jewellery and dental casting alike.

  • Flexible rubber walls allow you to squeeze the bowl to work out trapped air.
  • Smooth interior surface ensures easy cleaning and complete removal of cured investment.
  • Features a stable, flat base to prevent tipping during mixing.
  • Standard 4" x 5" size is ideal for jewellery and dental casting volumes.
  • Deep black colour provides high contrast against light-coloured investment powders.

Who it's for

Primarily for UK bench jewellers and casters using the lost-wax method for precious metals. Also widely used by dental-lab technicians preparing moulds for crowns, bridges, and other prosthetics.

Specifications

  • Material: Rubber
  • Colour: Black
  • Dimensions: 4" x 5" (approx. 101mm x 127mm)

Free UK delivery · Same-day dispatch before 2pm · 30-day returns

SKU: 4D-GWYZ-KNDS

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Henry P. ★★★★★

I was worried about bubbles ruining my cast, but squeezing this bowl's flexible rubber sides actually works to push the air out of the investment mix. It's small enough to fit in my hand, which makes the process a lot less messy than a rigid container.

Edward ★★★★★

The flexible rubber really lets me knead the air bubbles right out of the mix before the pour, and the 4" × 5" size is perfect for small batches. This bowl has saved me a lot of frustration with trapped air in my castings.

Christopher A. ★★★★★

The rubber is thick enough to feel sturdy but still bends exactly where you need it, and that squeeze-to-de-air trick works like a charm on my first pour. No more worrying about bubbles ruining the casting, and it rinses clean in seconds.

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