Removing the (printed) branding on glass

Discussion in 'Fettling Forum' started by Tony Press, Jan 11, 2021.

  1. Tony Press

    Tony Press Australia Subscriber

    Offline
    Joined:
    Aug 28, 2012
    Messages:
    7,025
    Location:
    Stinkpot Bay, Howden, Tasmania, Australia
    This technique is not likely to be required very often, and has limited application, but it is useful for Austramax owners.

    In this thread I pointed out that the branding on modern Chinese-made small Coleman bulge globes can be removed using dilute acid.

    Note: The branding is printed, not acid-, or mechanically-etched.

    Here is the technique:

    Printed branding.
    4F76030A-7DF2-44F4-85EC-13392049D9F1.jpeg

    Batch number.
    B05DD0D0-E344-42B7-8491-D9B899C0EB50.jpeg

    Printed branding.
    75DA9167-CDFB-4530-A3D3-AFA0351CD7C4.jpeg

    33% Hydrochloric Acid.
    A3D1C8BD-A556-4006-8521-37BB6EF37497.jpeg

    Dampen a cotton cloth with the 33% HCl, and rub the printing, keeping it wet, until it is removed.

    1E8EDD55-2335-453F-A66D-C02C84C457D5.jpeg

    If you can still see the “ghost” of the printing on the glass, use some slightly abrasive polish like Austosol to polish the glass to clear.
    8A904E6A-61B0-43C8-9B8E-6738692A0445.jpeg

    Final result.
    D1F87AE3-3DDF-4AC4-8D22-0DF910535D8A.jpeg


    Cheers

    Tony
     
  2. phaedrus42

    phaedrus42 Subscriber

    Offline
    Joined:
    Jun 14, 2014
    Messages:
    1,968
    A good technique, Tony! Certainly better than the "brute force and ignorance" way I've done it before, which was with cloth polishing wheel & brown polish cake.
    How did you discover that HCl does the trick?
     
  3. Tony Press

    Tony Press Australia Subscriber

    Offline
    Joined:
    Aug 28, 2012
    Messages:
    7,025
    Location:
    Stinkpot Bay, Howden, Tasmania, Australia
    Phil

    I can’t remember why I first tried it. I might have been pointed in that direction by someone, or by something I read.

    Cheers

    Tony

    @phaedrus42
     
  4. Norman

    Norman United States Subscriber

    Offline
    Joined:
    Jul 1, 2011
    Messages:
    642
    Location:
    Spokane, WA
    Great idea Tony.

    Cheers,
    Norman
     
  5. presscall

    presscall United Kingdom Subscriber

    Offline
    Joined:
    Jan 3, 2011
    Messages:
    547
    Location:
    Lancashire, UK
    Mmm, not something I can source at my Tesco Local.
     
  6. george United States

    Offline
    Joined:
    Nov 8, 2011
    Messages:
    2,894
    Location:
    USA
    Nice, Tony. :D/:thumbup:
     
  7. MYN

    Offline
    Joined:
    Feb 28, 2018
    Messages:
    1,962
    Location:
    Malaysia
    A useful tip.
    The concentration of the HCl is quite high. Tesco won't be selling that.
    By the way, are any non-acid products that can remove the printing?
     
  8. Buckaroo

    Buckaroo Australia Subscriber

    Offline
    Joined:
    Mar 21, 2020
    Messages:
    145
    Location:
    Wollongong, Australia
  9. Sellig33

    Sellig33 France Subscriber

    Offline
    Joined:
    May 15, 2017
    Messages:
    523
    Location:
    Gujan-Mestras - Gironde - France
    Thanks Tony :thumbup:
     
  10. Pancholoco1911 United States

    Offline
    Joined:
    Nov 26, 2019
    Messages:
    208
    Location:
    USA
    Toilet cleaner do the job for me but still leaves the ghost branding so ill be polishing mine after this post. Thanks Tony
     
  11. Kuman

    Kuman Sweden Subscriber

    Offline
    Joined:
    Sep 4, 2020
    Messages:
    62
    Location:
    Sweden
    It’s a valuable tip with acid @Tony Press , thank you!

    @Pancholoco1911 Does this cleaner contain phosphorus acid?

    I too don’t have HCl at hand at the moment, would be good to find something I could find on normal marketplace. Phosphorous acid is available here in Sweden so maybe that would be an option.
     
  12. MYN

    Offline
    Joined:
    Feb 28, 2018
    Messages:
    1,962
    Location:
    Malaysia
    A lot of toilet bowl cleaners, i.e.; Harpic, etc contain hydrochloric acid.
    Not anywhere near 33% of course.
    I can get HCl at approximately 30+ percent concentration from the local hardware shops in my area. They are use as industrial, mosaic floor cleaners. No brands, no instructions, no contact tracings and only a warning/caution sign of Danger: corrosive on the label.
     
  13. M.Meijer

    M.Meijer Subscriber

    Offline
    Joined:
    Jan 1, 2011
    Messages:
    447
    Location:
    Netherlands
    Any building supply chain should offer a removing agent of cement /mortar/concrete traces, or hazes, on glazed tiles etc. Usually (based on) HCL as it is cheap and effective. Acid from a car battery (sulphuric acid) should work likewise. And, acetone, an old and known paintstripper might work too on certain inks, so try the lady's nail polish remover?
     
  14. pontacko Germany

    Offline
    Joined:
    Dec 11, 2019
    Messages:
    2
    Location:
    Germany
    With burned-in splashes (beer ^^) I would be almost desperate.

    A little penetrating oil and steel wool 000 was the solution. As long as no other dirt gets on the spot, it won't leave scratches.

    Best regards
     

Share This Page