Primitive Archer
Main Discussion Area => HowTo's and Build-a-longs => Topic started by: Mohammad Javad Shoaee on November 02, 2010, 02:40:48 pm
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Hello
I know that Urac 185 is Urea Formaldehyde.here i can't find Urac so i want to use Urea Formaldehyde and it's a white power dislike urac which is brown paste.
is there any difference between these?and does anybody have any experience with it?
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I don't believe they are the same ??? UF is a raw material, not a finished product.
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Are you talking about woodwelds plastic resin. if so I did a bunch of internet research on it and it is activated by water only and is not gap fillling like urac. One cabinet making talk forum called it gap filling but once you start reading their messages you realize gap filling for one group of people is not the same as another. If I remember right the woodweld website did not consider itself a gap filling glue. btw the woodweld stuff is just a powder. and the stuff at my lumber store was grayish white. I have never used it but I think Pat B has said he has a friend who uses it and likes it.
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In this text has told that these are the same!
http://www.highlandwoodworking.com/library/urac.pdf
It's a white powder which must be mix with water and here they just use it for making laminated boards with warm pressure.
I want to know can i use it for laminated bows?
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I heard the reason Urac is brown is it has pecan shells ground up real fine for filler.
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That text calls it modified UF.
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A past member of PA from Italy, Alby, used Weldwood Plastic Resin in his lam bows with good results...and Alby made some fine lam bows and self bows. 8) He could not get Urac in Italy but he could get Weldwood P R. I used it on a few backed bow with good results. No failures.
It comes as a fine brown powder in a 1# tub(about $5.00) and you just add water and mix. I found it to be very similar to Urac.
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Thank you all.
problem is that i can't find or buy Urac or Weldwood here.i want to use raw urea formaldeyde which is a white powder.
i've found some formula on the net for adding flour as extender,limestone powder as filler and ammonium chloride as hardener and it'll have one hour pot life?
is it posible?
any advices are welcome?
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I've never made glue except for pitch glue that I use to haft arrow heads and blades, not bows. In the Traditional Bowyers Bible Vol I there is a chapter on glues. Might be info there about concocting glues but there is a strength test you could try with your mixtures and see which is strongest or if it is viable for what you need. Casine glues, modern carpenters glues and animal glues are all used and very effective in bow making.
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Where are you located Mohammed?I am sure there are local materials available that will make the glue you need for your purpose.
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The ingredients sound the same to me, just a different filler. I'd make a test batch and try it. I've had to do the same in Brazil for things I thought were simple to get in the US. We consulted Chemist, got the ingredients and mixed our own drilling mud concoction when Wyoming Bentonite wasn't available. TRY IT. ;D
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Thank You all.
Shekari i'm in Tehran,Iran.
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I guess you being in Iran it would be hard for me to send you some glue?
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If you want to pay freight- I will send a bottle of TB3...
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I've got a unopened container of Weldwood I'll send and pay the freight just to see if you get it. ;D
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Thank You all.I've many problem here ;D.I had many postage from USA and i got all of them.another problem is here we haven't any online money or credit card.(3rd world and devil governments >:D)
So i've to try hard for my works.
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Salam Mohammad,Halat chatori?
I think you should be able to use hide glue for your laminating purposes,It is called Suresh in India and if you are making a bow,seal it verywell using roghan e kaman.
I am sure there are some old carpenters and artisans who know the formula.
Regards
Shikari
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Thank You so much Shekari(Mamnoonam)
I have hide glue and i make myself Roghane Kaman.
Thanks for your guidance.
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Gentlemen,
What exactly is this Roghane Kaman and how do you make it?
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Hello
Roghane Kaman means bow oil and it's a oil based varnished which was used for bow making and for other crafts as varnish.
it's making is simple but you must be patient.first you must melt some resin like sandrak,mastic or even colophon and slowly add linseed oil to it.
if you a great instruction you must read last pages of Adam book in Ottoman Turkish Bow.
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Mohammad,
Thank you.
Sorry not to have thanked you before for the information, but I have not visited this site for a while.
Craig.