With one pound of Sodium Polytungstate Powder you would have 1 – 1.5 pounds of volume.

When the material gets watery, heat it up slightly to evaporate off some excess water. When too many minerals are in it filter off some to clean them away. If you need to change the density of the material add some distilled water to it.

You are using the correct filters. Once you have liquefied the powder material you should not dry it out.,
but keep it in liquid form. Over time and use it will discolor and the density will change. A drop or two of
hydrogen peroxide purchased from your local drugstore may help return the product to its original color.

All data from the SP products are also valid for SPT-0.

There can be some fluctuation when a water based product sits on a shelf, even in a controlled atmosphere.
We recommend slightly heating the product to get the desired density. In the future you may want to
purchase the Sodium Polytungstate Powder and mix your own.

We have not heard of any harmful effects, as long as you do it under a ventilation hood and practice the
same safety measures as you normally would.

The right product is based on your personal preference. To help you decide we usually suggest purchasing
one pound to test and see if you get the desired results for your project.

We have been supplying our chemical-based products for 70 years, they are a solid choice. We have been supplying the water-based products for over 30 years. For everyday use they are less toxic and a great choice as well. These products perform similarly.

Wash samples and all glassware by dissolving the remaining product in pure acetone. This acetone-product
mixture is then stored in containers. Recycle the product by adding water and separate the dissolved liquids.

It is common for the material to darken over time. A drop or two of hydrogen peroxide purchased from your local
drugstore may help return the product to its original color.