How much etchant

Discussion in 'General Electronics Chat' started by DaveH, May 27, 2009.

  1. DaveH

    Thread Starter Active Member

    Jan 1, 2009
    53
    0
    I've looked through this thread which was really useful.

    I used to buy it pre-mixed, I remember it was dark green in translucent plastic white bottles.

    Now I have bought a bag of 250g of pellets that's meant to make up 500ml of solution, but at first I only want to etch a small single sided board. How much do you think I should mix up?

    Should I mix the lot and store it or mix it in small batches? What's the smallest practicle size to mix?

    A few days later I may want to make 2 or 3 more similar sized boards.
     
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,672
    899
    I would mix it all up. It is quite stable as a liquid and easily stored in plastic bottles. John
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Last edited: May 27, 2009
  4. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    An old trick I use for FeCl is to wrap a paper towel around the seal, and thoroughly tape it in place. I have a bottle that I use occasionally, it is more than a decade old. Whenever I open it I just change the paper towel for a new one, the old one is usually crusty and brittle. The reason I do this is the fumes get out from the FeCl and corrode anything metal that might be next to it.
     
Loading...