Ferric Chloride Powder

Discussion in 'General Electronics Chat' started by ISB123, Sep 24, 2015.

  1. ISB123

    Thread Starter Well-Known Member

    May 21, 2014
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    Hello, I have 250g of FC in powder but I can't figure out how its supposed to be mixed. Some forums say 1/1 ratio,some say 1/2 and some say 1/3.
    On package it says add content in 0.5L of warm water but I doubt that this is correct ratio for PCB etching unless they mean one granule in 0.5L of water.
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    250 grams is .25 liters..
    So 250 grams of powder with .5L of water is a 1/2 ratio..

    Follow the directions..
     
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  3. MrAl

    Well-Known Member

    Jun 17, 2014
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    Hi,

    Be very careful, using eye protection and have lots of water available if anything goes wrong.
    Work within some larger container in case of a spill.
    Dont use HOT water, as this stuff can be very reactive. Very mildly warm water may be ok.
     
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  4. ian field

    Distinguished Member

    Oct 27, 2012
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    Usually with corrosive chemicals in crystal/powder form - the chemical should be added to the water.

    Sometimes, pouring water on a heap of reactive chemical causes a........well,er reaction.
     
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  5. ISB123

    Thread Starter Well-Known Member

    May 21, 2014
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    Last time I was dealing with chemicals I ended up dropping an aluminium heatsink in bucket full of HCL, that's when I found out that fumes are pretty good at clering stuffy nose :D.
     
  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Sounds like you shouldn't be using chemicals at all.... no really
     
  7. ISB123

    Thread Starter Well-Known Member

    May 21, 2014
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    [​IMG]
     
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  8. dl324

    Distinguished Member

    Mar 30, 2015
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    Good advice for mixing.

    When etching, you want the solution to be warmer than the hottest water you can get from a faucet to increase etch rate. I heat my solution in a water bath that's 150-200F.
     
  9. ian field

    Distinguished Member

    Oct 27, 2012
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    One of the local biker club told me he put an aluminium cylinder head in a bowl of caustic soda to de-coke it.

    He left it to soak overnight, by morning it was gone - he thought someone must've nicked it.
     
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  10. ISB123

    Thread Starter Well-Known Member

    May 21, 2014
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    He is genius,just like me:rolleyes:. Luckily in my case only the fins got etched away :)
     
  11. ian field

    Distinguished Member

    Oct 27, 2012
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    Once I put a Suzuki 50 cylinder, piston and head on a Yamaha 50.

    The Suzuki had a shorter stroke and at BDC it didn't clear the transfer ports, so I put a stack of M6 washers on each cylinder stud to raise the barrel. Originally I cut a cork sheet gasket to seal it, but that didn't last long. In the end I tied a length of bicycle inner tube round the gap - it worked, but every time the engine backfired, it farted!
     
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  12. ian field

    Distinguished Member

    Oct 27, 2012
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    Confusing drain cleaner for bath salts could be rather messy!
     
  13. 3dOptics

    Member

    Mar 15, 2009
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