EDTA Di- versus Tetra

Discussion in 'Alternative Processes' started by wilsonneal, Apr 3, 2007.

  1. wilsonneal

    wilsonneal Member

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    I've seen conflicting information on whether it's the Di- version or the Tetra- version that we should use for clearing baths in PtPd. What's the difference? If you order one instead of the other by mistake, is it unusable?
    Neal
     
  2. sanking

    sanking Restricted Access

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    One (Di-version) is acidic, the other (Tetra-version) is alkaline.

    Disodium EDTA is the best one for clearing pt/pd and kallitype.

    Sandy
     
  3. wilsonneal

    wilsonneal Member

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    EDTA in Ferric #1 and Sources

    Okay, thanks for that. I got some DiSodium. Can this also be used when making Ferric Solution #1, or is it better to use Tetra for that? The confusing thing is that B&S packs Tetra in their kits.

    Also, the least expensive source I've found for EDTA appears to be Artcraft, does anyone have a less expensive source? The Chemistry Store doesn't carry this.

    Thanks
    Neal