I’m trying to find a supplier of HDU board for chip carving which is normally done on European Lime wood this generally runs at a density around 540 to 590kg per m3 because of a bit of arthritis I need something around 250kg/m3, there are such products available in the states but they are too expensive for me to import, be grateful if anyone could point me in the right direction

This the stuff? 

http://easycomposites.co.uk/#!/patterns-moulds-and-tooling/tooling-and-modelling-board/pu-medium-density-model-board.html

Thanks for that.

Density looks great is there a difference between polyurethane and urethane?

Technically yes, but very likely not. Urethane just tends to be used as a broad term to encompass both urethanes and polyurethanes. So people often just say urethane when the product is infact a polyurethane. I'm not sure if there are many urethane products out there that are actually a true urethane rather than a polyurethane.

Thanks very much for the info Hanaldo, I have ordered a sample block to try it, if it’s the right stuff the price is less than the postage from the States so I could be on a winner, again thank you

I'm certain it will be the right product, a quick Google search for HDU board brings up a lot of hits for Rakutool which is a brand of polyurethane tooling board that I am very familiar with. 

Happy days if it is!

You could almost think they were the same product when you look at the TD sheet

New material arrived 18 hours after placing the order and it’s spot on, it’s approximately 1/2 to 2/3 the density of the average kiln dried Lime wood and it carves beautifully with crisp sharp definition to the cuts.

Thank you Hanaldo