How much etchant

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

  1. DaveH

    Thread Starter Active Member

    Jan 1, 2009
    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
    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
    Last edited: May 27, 2009
  4. Wendy


    Mar 24, 2008
    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.