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  • Darvan 7

Darvan 7

SKU:
$8.35
8.35 47 $8.35 - $47.00
Unavailable
per item

Okay, this is not technically a "dry material", but it'sstill a component used in ceramic chemistry, so we're going to put it in this category.


Darvan is a deflocculant and used to disperse ceramic suspensions to minimize their water content. It is a liquid alternative to the long popular sodium silicate. About twice as much is required typically (0.4-0.5%) however Darvan does offer a number of advantages. Typically soda ash is not needed as a complement and Darvan does not attack plaster molds. In addition slurries are much less sensitive to over deflocculation and are more stable. It is thus easier to reprocess scrap. However a number of engineers still prefer using a sodium silicate:soda ash mix to control thixotropic properties better, especially if little scrap is being added.


Darvan No. 7 is a high molecular weight, long chain polymer that has been used successfully as a general purpose dispersing agent for both ceramic bodies and glazes. Like 811 and 812, this poly-electrolyte shows the advantages mentioned above. Slips prepared with Darvan No. 7 show little tendency to thicken on standing (thus this version is considered better for glazes).


Chemical information per DigitalFire.com

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  • HOME
  • Clay
    • Low-Fire (04-06)
    • Mid-Fire (5-6)
    • High-Fire (9-12)
    • Non-Fired Clay
    • Casting Slip
    • Bulk Pricing
  • Glazes
    • Underglazes
      • Browse by Color
      • Mayco
      • Amaco
    • Low-Fire (04-06)
      • Browse by Color
      • Mayco
      • Amaco
      • Duncan
      • Low-Fire Clear Glazes
    • Mid-Fire (5-6)
      • Browse by Color
      • Mayco
      • Amaco
      • Duncan
      • Dry Dipping Glazes
      • Mid-Fire Clear Glaze
      • Reduction Results
    • Lusters (017-020)
  • Dry Materials
    • Chemicals
    • Plaster
    • Mason Stains
    • Bulk Pricing
  • Tools
  • Supplies
  • Equipment
    • Pottery Wheels
    • Ceramic Kilns
      • Parts
    • Kiln Furniture
    • Slabrollers
    • Extruders
    • Carts and Cabinets
    • Pugmills
  • Molds
    • GR Pottery Forms
    • Plaster Hump Molds
    • Sprig Molds
  • Bisqueware
  • Books
  • Glass
    • Sheet Glass
    • Glass Frit
    • Glass Accents
    • Tools and Supplies
    • GLASS KILNS
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    • Custom Clay
    • Other Services
  • Gift Cards
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