Originally Posted by
tucson
Years ago I built a full size Christen Eagle.
I had to build and glue all wing ribs.
I used a formaldehyde based glue.
For each batch of glue I mixed (powder and water)I glued two pieces of the wood together on end(1\4 inch overlapping each other)when the glue dried I placed the glued joint in a vice. Tightened the vice till the wood broke. If the wood broke at the glue joint first the rib was unusable. It always broke outside the joint for me. I wonder why modelers have not used this glue in there models?
Stan
Formaldehyde based glue? Eeek, if the formaldehyde molecules are free roaming then I hope you used a respirator. Formaldehyde and paraformaldehyde (PFA) are fixing agents in biology (they freeze the cell mechanics for preservation), and the fumes can be deadly since your wet lungs readily absorb the agent. I once mixed up a batch of PFA in a biology lab, and very stupidly opened the hot bottle that the solid chips of sodium hydroxide were melting in to adjust the pH, and caught a whiff of the vapour which poured out readily. I felt terrible for the rest of the day, and should have gone to the ER since you can die from a big inhalation.
Did the glue get warm when you mixed the powder and water? If it did, a reaction was taking place and could release fumes. Over time this could destroy lung tissue.
Could be why it is not used for models!