3D Design | 3D Printer | 3D Slicer | 3D-Printed Clay | 3D-Printing | Abrasion Ceramics | Acidic Oxides | Agglomeration | Alkali | Alkaline Earths | Amorphous | Analysis | Apparent porosity | Bacteria | Ball milling | Bamboo Glaze | Base Glaze | Base-Coat Dipping Glazes | Basic Oxides | Batch Recipe | Binder | Bisque | Bit Image | Black Coring | Bleeding colors | Blisters | Bloating | Blunging | Bone China | Borate | Boron Blue | Boron Frit | Borosilicate | Breaking Glaze | Brushing Glazes | Buff stoneware | Calcination | Calculated Thermal Expansion | Candling | Carbon Burnout | Carbon trap glazes | CAS Numbers | Casting-Jiggering | Celadon Glaze | Ceramic | Ceramic Decals | Ceramic Glaze | Ceramic Ink | Ceramic Material | Ceramic Oxide | Ceramic Slip | Ceramic Tile | Ceramics | Characterization | Chromaticity | Clay | Clay body | Clay Body Porosity | Clay Stiffness | Co-efficient of Thermal Expansion | Code Numbering | Coil pottery | Colloid | Colorant | Cone plaque | Cones | Copper Red | Cordierite Ceramics | Crackle glaze | Crawling | Crazing | Cristobalite | Cristobalite Inversion | Crucible | Crystalline glazes | Crystallization | Cuerda Seca | Cutlery Marking | De-Airing Pugmill | Decomposition | Deflocculation | Deoxylidration | Digitalfire Foresight | Digitalfire Insight | Digitalfire Insight-Live | Digitalfire Reference Library | Dimpled glaze | Dip Glazing | Dipping Glazes | Dishwasher Safe | Dolomite Matte | Drop-and-Soak Firing | Drying Crack | Drying Performance | Drying Shrinkage | Dunting | Dust Pressing | Earthenware | Efflorescence | Encapsulated Stains | Engobe | Eutectic | Fast Fire Glazes | Fat Glaze | Feldspar Glazes | Firebrick | Fireclay | Fired Strength | Firing | Firing Schedule | Firing Shrinkage | Flameware | Flashing | Flocculation | Fluid Melt Glazes | Flux | Food Safe | Foot Ring | Forming Method | Formula | Formula Ratios | Formula Weight | Frit | Fritware | Functional | GHS Safety Data Sheets | Glass vs. Crystalline | Glass-Ceramic Glazes | Glaze Bubbles | Glaze Chemistry | Glaze Compression | Glaze Durability | Glaze fit | Glaze Gelling | Glaze Layering | Glaze Mixing | Glaze Recipes | Glaze Shrinkage | Glaze thickness | Globally Harmonized Data Sheets | Glossy Glaze | Green Strength | Grog | Gunmetal glaze | Handles | High Temperature Glaze | Hot Pressing | Incised decoration | Ink Jet Printing | Inside-only Glazing | Interface | Iron Red Glaze | Jasper Ware | Jiggering | Kaki | Kiln Controller | Kiln fumes | Kiln venting system | Kiln Wash | Laminations | Leaching | Lead in Ceramic Glazes | Leather hard | Lime Popping | Limit Formula | Limit Recipe | Liner Glaze | LOI | Low Temperature Glaze Recipes | Lustre Colors | Majolica | Marbling | Material Substitution | Matte Glaze | Maturity | MDT | Mechanism | Medium Temperature Glaze | Melt Fluidity | Melting Temperature | Metallic Glazes | Microwave Safe | Mineralogy | Mocha glazes | Mole% | Monocottura | Mosaic Tile | Mottled | Mullite Crystals | Native Clay | Non Oxide Ceramics | Normalization | Oil-spot glaze | Once fire glazing | Opacifier | Opacity | Ovenware | Overglaze | Oxidation Firing | Oxide Interaction | Oxide System | Particle orientation | Particle Size Distribution | PCE | Permeability | Phase change | Phase Diagram | Phase Separation | Physical Testing | Pinholing | Plaster table | Plasticine | Plasticity | Plucking | Porcelain | Pour Glazing | Precipitation | Primary Clay | Primitive Firing | Production Setup | Propane | Propeller Mixer | Pyroceramics | Pyroceramics | Quartz Inversion | Raku | Reactive Glazes | Reduction Firing | Reduction Speckle | Refractory | Refractory Ceramic Coatings | | Respirable Crystalline Silica | Rheology | Rutile Glaze | Salt firing | Sanitary ware | Sculpture | Secondary Clay | Shino Glazes | Shivering | Sieve | Silica:Alumina Ratio (SiO2:Al2O3) | Silk screen printing | Sintering | Slaking | Slip Casting | Slip Trailing | Soaking | Soluble colors | Soluble Salts | Specific gravity | Splitting | Spray Glazing | Stain | Stoneware | Stull Chart | Sulfate Scum | Sulfates | Surface Area | Surface Tension | Suspension | Tapper Clay | Tenmoku | Terra cotta | Terra Sigilatta | Theoretical Material | Thermal Conductivity | Thermal shock | Thermocouple | Thixotropy | Tony Hansen | Toxicity | Tranlucency | Translucency | Transparent Glazes | Triaxial Glaze Blending | Ultimate Particles | Underglaze | Unity Formula | Upwork | Vaporization | Viscosity | Vitrification | Volatiles | Warping | Water in Ceramics | Water Smoking | Water Solubility | Wedging | Wheel Bat | Whiteware | Wood Ash Glaze | Wood Firing | Zero3 | Zeta Potential

Representative Sample

In an testing process, it is important that the sample being tested is representative of the entire lot being evaluated. In production, this could be thousands or bags, boxes, tons, etc. Representative samples are essential, for example, when evaluating a clay deposit for mining, when testing a stockpile for use or when testing batches of powder, slurry, pelletized or pugged material for quality assurance in production.

The term representative refers specifically to the property being evaluated. For example, powders being evaluated for particle size distribution need to be sampled in such a way that the distribution of particle sizes in the sample is representative of the entire batch being tested. Or a pugged sample may be extracted are some point during a production run that is judged to be representative.

A three pan sample-splitter. Powdered clay is poured into the top and split, half going into each pan below. The cycle is repeated until the desired sample size is achieved. The objective is a representative sample for particle size distribution tests.

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Tests Sieve Analysis 35-325 Wet

By Tony Hansen


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