Synthetic Red Iron Oxide (high purity 325 mesh) - Brackers Good Earth Clays

Synthetic Red Iron Oxide (high purity 325 mesh) - Brackers Good Earth Clays

4.7
(435)
Write Review
More
$ 5.00
Add to Cart
In stock
Description

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

Brackers Good Earth Clays Serving Kansas, Missouri, Nebraska, Oklahoma, Iowa, Arkansas & Illinois and beyond

Raw Materials & Chemicals - Page 1 - Brackers Good Earth Clays

Spotlight: Nick Joerling shifts gears Techno File - Ceramic Arts Daily

Iron Oxide Red

Bracker's Good Earth Clays Inc.

Iron Oxide-Red (High Purity)

Terra Cotta - Brackers Good Earth Clays

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

Dolomite (325 mesh) - Brackers Good Earth Clays

Raw Materials & Chemicals - Colorants & Opacifiers - Page 1 - Brackers Good Earth Clays

Glazes Brackers Good Earth Clays