Bracker's Good Earth Clays provides clay and other ceramic materials, equipment, tools, and toys to potters and sculptors in Kansas, Missouri, Nebraska, Iowa, Arkansas, Oklahoma, Illinois and beyond. In Lawrence Kansas since 1982.
Ceramics%20Monthly%20Technofile%20article%20from%20March%202011%20%22All%20about%20iron%22%20by%20John%20Britt%20%26nbsp%3BIron%26mdash%3BThe%20fourth%20most%20common%20element%20in%20the%20earth%26rsquo%3Bs%20crust%20and%20the%20most%20common%20element%20(in%20terms%20of%20mass)%20on%20the%20planet%2C%20comprising%2035%25%20of%20the%20earth%26rsquo%3Bs%20core.%20%20Melting%20Point%3A%202795%26deg%3BF%20(1535%26deg%3BC%20)%20Toxicity%3A%20Non-toxic%20%20%20Datasheet%20from%20manufacturerSafety%20Data%20Sheet%20(SDS)%26nbsp%3B%20%20%20PLEASE%20NOTE%3AIf%20you%20are%20mixing%20up%20a%20Steven%20Hill%20glaze%20that%20calls%20for%20%22High%20Purity%20Red%20Iron%20Oxide%2C%22%20he%20gets%20his%20materials%20through%20another%20source%20-%20US%20Pigment.%20Steven%20has%20said%20that%20his%20Red%20Orange%20glaze%20will%20NOT%20turn%20out%20as%20expected%20if%20you%20use%20a%20different%20iron.%20Steven%20went%20on%20to%20tell%20me%20that%20using%20the%20US%20Pigment%20version%20of%20the%20high%20purity%20red%20iron%20oxide%20is%20not%20as%20critical%20in%20the%20Juicy%20Fruit%20glaze%20recipe.%20Synthetic%20red%20iron%20oxide%20is%20the%20most%20common%20colorant%20in%20ceramics%20and%20has%20the%20highest%20amount%20of%20iron.%20It%20is%20available%20commercially%20as%20a%20soft%20and%20very%20fine%20powder%20made%20by%20grinding%20ore%20material%20or%20heat%20processing%20ferrous%2Fferric%20sulphate%20or%20ferric%20hydroxide.%20During%20firing%20all%20irons%20normally%20decompose%20and%20produce%20similar%20colors%20in%20glazes%20and%20clay%20bodies%20(although%20they%20have%20differing%20amounts%20of%20Fe%20metal%20per%20gram%20of%20powder).%20Red%20iron%20oxide%20is%20available%20in%20many%20different%20shades%20from%20a%20bright%20light%20red%20at%20a%20deep%20red%20maroon%2C%20these%20are%20normally%20designated%20by%20a%20scale%20from%20about%20120-180%20(this%20number%20designation%20should%20be%20on%20the%20bags%20from%20the%20manufacturer%2C%20darker%20colors%20are%20higher%20numbers)%2C%20however%20in%20ceramics%20these%20different%20grades%20should%20all%20fire%20to%20a%20similar%20temperature%20since%20they%20have%20the%20same%20amount%20iron.%20The%20different%20raw%20colors%20are%20a%20product%20of%20the%20degree%20of%20grinding.%26nbsp%3B%20%20In%20oxidation%20firing%20iron%20is%20very%20refractory%2C%20so%20much%20so%20that%20it%20is%20impossible%2C%20even%20in%20a%20highly%20melted%20frit%2C%20to%20produce%20a%20metallic%20glaze.%20It%20is%20an%20important%20source%20for%20tan%2C%20red-brown%2C%20and%20brown%20colors%20in%20glazes%20and%20bodies.%20Iron%20red%20colors%2C%20for%20example%2C%20are%20dependent%20on%20the%20crystallization%20of%20iron%20in%20a%20fluid%20glaze%20matrix%20and%20require%20large%20amounts%20of%20iron%20being%20present%20(eg.%2025%25).%20The%20red%20color%20of%20terra%20cotta%20bodies%20comes%20from%20iron%2C%20typically%20around%205%25%20or%20more%2C%20and%20depends%20of%20the%20body%20being%20porous.%20As%20these%20bodies%20are%20fired%20to%20higher%20temperatures%20the%20color%20shifts%20to%20a%20deeper%20red%20and%20finally%20brown.%20The%20story%20is%20similar%20with%20medium%20fire%20bodies.%20%20In%20reduction%20firing%20iron%20changes%20its%20personality%20to%20become%20a%20very%20active%20flux.%20Iron%20glazes%20that%20are%20stable%20at%20cone%206-10%20in%20oxidation%20will%20run%20off%20the%20ware%20in%20reduction.%20The%20iron%20in%20reduction%20fired%20glazes%20is%20known%20for%20producing%20very%20attractive%20earthy%20brown%20tones.%20Greens%2C%20greys%20and%20reds%20can%20also%20be%20achieved%20depending%20on%20the%20chemistry%20of%20the%20glaze%20and%20the%20amount%20of%20iron.%20Ancient%20Chinese%20celadons%2C%20for%20example%2C%20contained%20around%202-3%25%20iron.%20%20Particulate%20iron%20impurities%20in%20reduction%20clay%20bodies%20can%20melt%20and%20become%20fluid%20during%20firing%2C%20creating%20specks%20that%20can%20bleed%20up%20through%20glazes.%20This%20phenomenon%20is%20a%20highly%20desirable%20aesthetic%20in%20certain%20types%20of%20ceramics%2C%20when%20the%20particles%20are%20quite%20large%20the%20resultant%20blotch%20in%20the%20glaze%20surface%20is%20called%20a%20blossom.%20%20Iron%20oxide%20can%20gel%20glaze%20and%20clay%20slurries%20making%20them%20difficult%20to%20work%20with%20(this%20is%20especially%20a%20problem%20where%20the%20slurry%20is%20deflocculated).%20%20Iron%20oxide%20particles%20are%20very%20small%2C%20normally%20100%25%20of%20the%20material%20will%20pass%20a%20325%20mesh%20screen%20(this%20is%20part%20of%20the%20reason%20iron%20is%20such%20a%20nuisance%20dust).%20As%20with%20other%20powders%20of%20exceedingly%20small%20particle%20size%2C%20agglomeration%20of%20the%20the%20particles%20into%20larger%20ones%20can%20be%20a%20real%20problem.%20These%20particles%20can%20resist%20break%20down%2C%20even%20a%20powerful%20electric%20mixer%20is%20not%20enough%20to%20disperse%20them%20(black%20iron%20oxide%20can%20be%20even%20more%20difficult).%20In%20such%20cases%20screening%20a%20glaze%20will%20break%20them%20down.%20However%20screening%20finer%20than%2080%20mesh%20is%20difficult%2C%20this%20is%20not%20fine%20enough%20to%20eliminate%20the%20speckles%20that%20iron%20can%20produce.%20Thus%20ball%20milling%20may%20be%20the%20only%20solution%20if%20the%20speckle%20is%20undesired.%20%20Red%20iron%20oxides%20are%20available%20in%20spheroidal%2C%20rhombohedral%2C%20and%20irregular%20particle%20shapes.%20Some%20high%20purity%20grades%20are%20specially%20controlled%20for%20heavy%20metals%20and%20are%20used%20in%20drugs%2C%20cosmetics%2C%20pet%20foods%2C%20and%20soft%20ferrites.%20Highly%20refined%20grades%20can%20have%2098%25%20Fe2O3%20but%20typically%20red%20iron%20is%20about%2095%25%20pure%20and%20very%20fine%20(less%20than%201%25%20325%20mesh).%20Some%20grades%20of%20red%20iron%20do%20have%20coarser%20specks%20in%20them%20and%20this%20can%20result%20in%20unwanted%20specking%20in%20glaze%20and%20bodies.%20%20High%20iron%20raw%20materials%20or%20alternate%20names%3A%20burnt%20sienna%2C%20crocus%20martis%2C%20Indian%20red%2C%20red%20ochre%2C%20red%20oxide%2C%20Spanish%20red.%20Iron%20is%20the%20principle%20contaminant%20in%20most%20clay%20materials.%20A%20low%20iron%20content%2C%20for%20example%2C%20is%20very%20important%20in%20kaolins%20used%20for%20porcelain.%20%20One%20method%20of%20producing%20synthetic%20iron%20oxide%20is%20by%20burning%20solutions%20of%20Ferric%20Chloride%20(spent%20pickle%20liquor%20from%20the%20steel%20industry)%20to%20produce%20Hydrochloric%20Acid%20(their%20main%20product)%20and%20Hematite%20(a%20byproduct).%20100%25%20pure%20material%20contains%2069.9%25%20Fe.%20-%20Digital%20Fire%20ceramic%20materials%20database
Bracker's Good Earth Clays Inc.
Brackers Good Earth Clays Serving Kansas, Missouri, Nebraska, Oklahoma, Iowa, Arkansas & Illinois and beyond
Brackers Good Earth Clays Serving Kansas, Missouri, Nebraska, Oklahoma, Iowa, Arkansas & Illinois and beyond
Tools Brackers Good Earth Clays
Raw Materials & Chemicals - Page 1 - Brackers Good Earth Clays
Brackers Good Earth Clays Serving Kansas, Missouri, Nebraska, Oklahoma, Iowa, Arkansas & Illinois and beyond
General Raw Materials – Tagged Material Type_Coloring Oxides and Carbonates – Krueger Pottery Supply
Raw Materials & Chemicals - Page 1 - Brackers Good Earth Clays
Synthetic Red Iron Oxide (high purity 325 mesh) - Brackers Good Earth Clays
stud io reference - Ceramic Arts Daily
Red Copper Oxide - Brackers Good Earth Clays
Brackers Good Earth Clays Serving Kansas, Missouri, Nebraska, Oklahoma, Iowa, Arkansas & Illinois and beyond
Bracker's Good Earth Clays Inc.