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Lead in Frits: The Hazards

Lead has been used in ceramics for thousands of years because it works so well, that is, leaded glazes melt at low temperatures, have low thermal expansion, dazzling colors and tolerance to variable firing. Frits are a modern development that have dramatically improved the safety with which the material can be handled. Notwithstanding this, leaded frits are difficult to obtain in recent years.

Generally most leaded frits were thought be fairly insoluble and safe to use as raw powdered materials, however recent findings about the disproportionately large effects of low lead levels call this into question. In addition, the glazes they produce will be as leachable for a given lead percentage as if the lead came from raw lead carbonate or lead oxide. There is a huge range of lead content in frits, some may have 1%, others 80%. To create a safe leaded glaze you need equipment to measure leaching of lead and expertise in ceramic chemistry to find the oxide profiles that release the least amount of lead.

Therefore we are no describing any safer ways to use lead here. Please check the reference links on this page.

Related Information

Links

Materials Lead Carbonate
Materials Ferro Frit 3300
Materials Ferro Frit 3481
Materials Ferro Frit 3493
Materials Ferro Frit 3497
Materials Ferro Frit 3386
Materials Ferro Frit 3482
Materials Ferro Frit 3496
Materials Pemco Frit P-83
Materials Lead Monosilicate Frit
Materials Pemco Frit Pb-83
Materials General Frit GF-42
Materials Ferro Frit 3548
Materials Antimonate Of Lead
Materials Lead Bisilicate Frit
Materials Pemco Frit Pb-316
Materials Ferro Frit 3327
Materials Ferro Frit 3470
Materials Ferro Frit 3490
Materials Ferro Frit 3600
Materials General Frit GF-9
Materials Hommel Frit 240
Materials Ferro Frit 3304
Materials Ferro Frit 3403
Materials Ferro Frit 3489
Hazards Lead Toxicology
Hazards Lead in Ceramic Glazes: What Did We Learn?
Projects Frits
Glossary Lead in Ceramic Glazes
Lead is a melter in ceramic glazes and performs exceptionally well. However recent findings show it to be even more environmentally pervasive and toxic at low levels than originally thought

By Tony Hansen


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