As every woodworker knows, traditional hot bone glue is absolutely the best in so many ways - except for having to keep it bubbling away continuously or spending time bringing it back up to temp. I've just hit on the solution - microwave - and it works!! You keep the prepared glue in a jam jar (they're all heatproof nowadays) with a lid on. When you need it just pop it in the microwave without the lid for a few seconds - need to watch it carefully; give it
10 second blasts. Then put the jar in a bigger jar or pyrex bowl etc with hot water in to keep temperature up as per trad double boiler. If it cools too much just pop the whole lot (jar in bigger jar/bowl) back in the microwave again (without the lid if metal but a loose fitting pyrex kilner jar type lid would be OK). When finished put the lid back on to keep out dust and stop it drying out. Don't suppose I'm the 1st to think of it it's so obvious I'm wondering why I didn't think of it sooner.cheers
Jacob