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

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

4.5
(212)
Write Review
More
$ 4.00
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 - Colorants & Opacifiers - Page 1 - Brackers Good Earth Clays

Sil-Co-Sil 45 (Flint 325 Mesh) - - Brackers Good Earth Clays

Bracker's Good Earth Clays Inc.

Tools Brackers Good Earth Clays

Dolomite (325 mesh) - Brackers Good Earth Clays

Sil-Co-Sil 45 (Flint 325 Mesh) - - Brackers Good Earth Clays

Iron Oxide Red

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

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

Clay Times Magazine Volume 15 • Issue 84 by claytimes - Issuu