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Thread: Firescale with oxy / propane

  1. #1
    Join Date
    Mar 2023
    Posts
    2

    Default Firescale with oxy / propane

    Hi all, newbie to the forum,
    I have for a long time just been using a standard canister style propane torch for soldering and annealing sterling silver with very little issues in the way of firescale. Thought I would buy a Smiths little torch which is running on oxy /propane, and suddenly firescale has become a major issue. Went back to the straight propane torch and no problems at all. So is this a common issue when using oxy / propane? By the way I had the little torch running with a neutral flame
    Any help would be appreciated

  2. #2
    Join Date
    Dec 2009
    Location
    Central London
    Posts
    8,846

    Default

    Hi Techno, and welcome to the Forum.
    You get firescale when you linger in one place with an oxidising flame and create hot spots.
    So work in a darkened area to see this, and keep the flame moving. Dennis.

  3. #3
    Join Date
    Mar 2023
    Posts
    2

    Default

    Thanks Denis, it may well be with the little torch running quite a bit hotter than the straight propane, and it could also be the flame had a little more oxygen in it than I thought.

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