And another one bites the dust

[Stick Bender]

I don't  know about a flax fix on that I wouldn't  try maybe if there was enough wood scrape below & sinew if it was going to be a save , but  any rate got the last batch of flax I got on esty

[PEARL DRUMS]

Judging by the dark spots on the sides of the bow, Id say plenty of heat is getting around to the back. You really need to prevent that. HHB is very sensitive to that, I found out firsthand. Seems if the back gets a bit over-dry just once, its tension strength is gone quite often regardless of how long you let it acclimate afterwards. If you are using a backed caul, don't, they reflect and capture a lot of heat.

[bjrogg]

Judging by the dark spots on the sides of the bow, Id say plenty of heat is getting around to the back. You really need to prevent that. HHB is very sensitive to that, I found out firsthand. Seems if the back gets a bit over-dry just once, its tension strength is gone quite often regardless of how long you let it acclimate afterwards. If you are using a backed caul, don't, they reflect and capture a lot of heat.

I agree with Pearl. It's worst with narrow stave and wider caul. I'm thinking about making a even narrower caul for those narrow Wonky staves. The round back makes it worst to. The HHB seems to me to like the heated belly, but like Pearl said not the back.
Bjrogg

[bjrogg]

PS this is for Pearl. Hope you don't mind Upstate. What do you mean by backed caul? I try to keep charred spots off my caul they really aggrevate the problem. Was even toying with idea of rounding edges of caul to help heat get away. Curious what you use Pearl probably should just start a different thread  I suppose.
Bjrogg 

[upstatenybowyer]

Judging by the dark spots on the sides of the bow, Id say plenty of heat is getting around to the back. You really need to prevent that. HHB is very sensitive to that, I found out firsthand. Seems if the back gets a bit over-dry just once, its tension strength is gone quite often regardless of how long you let it acclimate afterwards. If you are using a backed caul, don't, they reflect and capture a lot of heat.

This makes a lot of sense. It could explain other failures I've had in the past. And no worries bj, that's a great question.