I've always used double glue joints with my wood glue, building balsa and paper rockets. It occurred to me recently though that there's an aspect I don't understand. Most instructions say to apply the first layer of glue, and then wait... well, an unspecified length of time. Then apply the second layer and attach.
The question is how long to wait before applying the second layer. Is it necessary for that first layer to still be wet, or tacky, or something? If the first layer dries completely before the second layer is applied, does that help, hurt, or not affect the joint?
In my own practice, I realize that I'm not particularly consistent with how long I wait between the first and second glue layers. Does it matter?
The question is how long to wait before applying the second layer. Is it necessary for that first layer to still be wet, or tacky, or something? If the first layer dries completely before the second layer is applied, does that help, hurt, or not affect the joint?
In my own practice, I realize that I'm not particularly consistent with how long I wait between the first and second glue layers. Does it matter?