Search results for query: oxalic acid

Thanks Richard and Phil, yes it's likely from metal tool contact. I have since done some searching online and Oxalic acid was mentioned in several videos, we have some Barkeepers Friend cleaning powder and it contains Oxalic acid. I did a test spot in the centre of the oak cutoff and it did...

The staining might be shallow as it might have been just brief contact with the saw chain that caused it. You'll not know til it dries. You might have some luck removing the stain with oxalic acid.

As Oxalic Acid is an acid (clues in the name!), you need to neutralise it. The most redily available alkaline is Baking Powder (Sodium Bicarbonate).

You could try oxalic acid and soda

Sorry for my ignorance but what do you mean by neutralising it - after treating with the oxalic, wash it off afterwards with a water/bicarbonate mix?

I'll remember that for when i get past it, ive got plenty of oxalic in the shed 😆

Obviously too late late now but oxalic acid should always be well rinsed off. Dry residue/ crystals should definitely not be sanded. The dust is very poisonous. Suggs of madness, his great grandfather who ran a pub down the Kings road accidentally took a swig of oxalic acid which was stored in...

yes, exactly that. Any acid will continue to react until it is neutralised by the application of a alkali to bring the ph level down. I have used oxalic acid since training in 1977 and we always stopped the action by that means.

Just for interest sake Oxalic acid is found in Rhubarb (I never touch the stuff), mainly in the leaves. Though toxic the body obviously can cope with these low levels found in rhubarb.

May I ask what have you used to apply the ink? Brush on?

Bit of a thread resurrection: Is this stuff likely to do same job as oxalic acid for removing water staining on my cedar: Link When I searched for oxalic acid that came up in the search so I assume there is a reason for that....

According to the furniture fixer uppers on you tube you should always wash off the dried residue of oxalic acid before sanding. Apparently the dust isn't good for you. You can of course completely disregard anything shown on you tube.

The most powerful bleaching agents are "Two-part" wood bleaches available from Polish Merchants (that's merchants who sell polishes, not Poland!). It is also possible to use oxalic acid to speed up the task. Definitely a PPE task (rubber gloves etc.). Often used in antique furniture restoration.

Might be advisable, as it is poisonous. Water staining tends to be where it has affected or penetrated a finish in certain areas. I take it that the finish has been removed prior to treatment, so I can't see that an overall rinse to remove the oxalic acid residue, would cause water staining.

...activity) you should be able to deal with the visible discolouration which is the result of that fungal activity, e.g., sanding and/or oxalic acid treatment, and maybe some dying and/or staining. I suppose there is a need on your part to ensure there isn't a historical and still active...

...Over time the appearance will even out If you really want to even the finish out first giving it a scrub with something like oxalic acid would help with the staining. I’d avoid sanding as would be a horrible job given the profile on the boards. The door would need fully refinishing, I’d...

looks more like a metal stain, water could have reacted with some iron dust and the tannins in the wood? Oxalic acid is the normal choice for bleaching wood, but test on an inconspicuous area first.

Just applying some 1:6 mix to cedar cladding. Should I rinse it off with water after? Seems like it could reintroduce the water staining.....

Get some oxalic acid and see if it removes the staining..... Mix it with warm / hot water, not cold..... once stain has gone, wipe over with clean water to get rid of it, its not nice to get the dust from oxalic when sanding

...some holly. It's a very pale wood and combine it with a white stain to make it even more pale and it could be close enough to white. Oxalic acid probably won't do much to help, I've used it to remove minor water marks in wood but I wouldn't say there's much of a bleaching effect with regards...