Hide Glue #3: Answering : Veneering with Old Brown Glue

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Blog entry by Patricelejeune posted 06-06-2013 05:46 PM 3041 reads 0 times favorited 4 comments Add to Favorites Watch
« Part 2: Old Brown Glue videos Part 3 of Hide Glue series Part 4: Easy clean up with Old Brown Glue, no damage to finish »

Answering the question – veneering with Old Brown Glue

Let me know if you have any questions

-- Patrice lejeune

4 comments so far

View DrDirt's profile


4592 posts in 4278 days

#1 posted 06-10-2013 10:42 PM

With the OBG – is there a reason you would not want to use it in a vacuum bag vs. Cold press?

I have bagged with white and Titebond 3 as well as epoxy and Urea Formaldehyde with no issues.

Just curious is vacuum bagging Old Brown Glue is something to avoid.

-- “The two most important days in your life are the day you are born and the day you find out why.” Mark Twain

View Patricelejeune's profile


383 posts in 2456 days

#2 posted 06-10-2013 11:31 PM

I use the vaccum bag only for veneering curves, but always with Old Brown Glue. The reason we use or press cold or hot is because we have a big one, and it takes some room, so we better use it!

I used a vacuum bag for that project with OBG liquid hide glue. Details there

I also did a marquetry guitar on a Les Paul form. Vacuum bag and Old Brown Glue

The guitar

The marquetry

The set up

The glueing

For bombé, often there is a place where it lifts a bit, so was it for the bottom, moisture, heat with a edge bending iron, pressed it with a caul, and done.

I did some laminations and it worked fine, less to no spring back on lamination was what I found out.

The difference with vacuuming with other glues is I had couple layers of news paper to help the moisture go out. For the rest it works as well as other glue, but you add the advantage of hide glue to your work

Tt is reversible, if your glueing was not perfect, like with my guitar, no problem
Cleaning is easy if it leaks to the bag, and again it does not “stain” the wood like some of the glues.

I am doing a marquetry frame that will be on a cove I will try to remember to do a video on it.

I hope this answered your question, I will post the link to the vacuum bag video as soon as I made it.

-- Patrice lejeune

View DrDirt's profile


4592 posts in 4278 days

#3 posted 06-11-2013 04:19 PM

Thank you Patrice – I had looked around on the net a bit before asking directly, and there were some discussions about needing to allow for evaporation, and glue still being tacky after bagging overnight.

To me those issues I would expect to be present in PVA glue as well, but bagging is OK.

Also saw some discussion about needing to modify hot hide glue with urea or salt. But thought that those additions were done already for OBG and other liquid hide.

Lots of conflicting information out there – good to hear directly from people that have actually done it, rather than repeating things they have heard.

Thanks again.

-- “The two most important days in your life are the day you are born and the day you find out why.” Mark Twain

View Patricelejeune's profile


383 posts in 2456 days

#4 posted 06-11-2013 05:16 PM

Old Brown glue and any modify hide glue, will have an increase presence of water and therefore with the addition of a delay agent will work by loss of moisture.

We developed Old Brown Glue, mainly for our own use, only then have we been encourage to market it. It is not very hard to make liquid hide glue, for those who wants to try, it just takes a lot of testing before to find a recipe that works well. We make it in big batches so the glue is always the same and we bye 50 pound bags of very fresh glue, which has its importance when you add moisture to a product that mold loves. Look also at the PH. I will discourage any use of salt, in my research I believe that salt modifies the glue by damaging the protein molecule itself where urea uses a molecular binding.

So yes for me PVA, yellow, glue, any glue that work with loss of moisture work the same in bag. I remember with PVA that when vacuuming there was still some glue not dry on the outside that had been squished out, this is what I believe you have read being tacky.
In my opinion, if I find some not totally dry glue in my back, I prefer to have some tacky glue like OBG than just wet like a PVA.

I always use more news papers with those glue just to help the moisture to get out and leave it overnight, if it is a cold night like were the winter in my workshop in Paris, I will open in the morning and change the news paper before to press again just to be on the safe side. PVA yellow or liquid hide glue. But anyway anything that has not glued can be repaired and re-glued, re-flatened with hide glue.

The main difference we have with any other glue company is we developed OBG for our own use because nothing satisfactory was on the market.

Thanks for your questions, I put my molding planes out for a video on vacuum bag with Old Brown Glue ASAP.

-- Patrice lejeune

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