WSR - Wet Sieve Residue Test

Used for ball clays. Gives indication of the presence of coarse silica or lignite. Visual observation of this residue is more valuable than the printed value. Analyzing this amount relative to carbon content and LOI can be enlightening also.

This is what labs use to measure particle size

Two example of high quality brass laboratory sieves

This picture has its own page with more detail, click here to see it.

To measure particle size in a slurry or powder you need sieves. This is the most popular type used in labs. They are made from brass by a company named Tyler. The range of screen sizes for testing particle size is very wide (obvious here: the top screen has an opening of 56 mm, the bottom one 0.1 mm - the wires are almost too small to see). You can often buy these used on Ebay for a lot less than new ones, search for "tyler sieve". The finer sieves (especially 200) are fragile and more easily ripped. For potters it is good to have a 50, 100 and 150.

Variables

VAL - Value (V)

Describe residue

Related Information

Videos

Links

Tests	% Passing 325 Mesh Wet
Tests	Hegman Fineness
Tests	LOI/Density/Water Content LDW LOI, density and water content test procedure for plastic clay bodies and porcelains
Typecodes	Particle Tests Tests conducted to determine particle populations, sizes, shapes, densities, surface areas, etc.
Glossary	Sieve Sieves are important in ceramics for removing particulates and agglomerates from glaze, engobe and body slurries.

By Tony Hansen
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