Xpress premium Flock . Cutting guidance

[Ravisteam]

Hi Guys I have to cut 7M of Xpress premium flock ..What is the best blade setting to cut this .Xpress web site says Flock Blade ?? .Googled and find out recommended blade is 60 degrees ..tried a test cut with my 45 degree blade and its difficult to weed ..So is it only 60 degree blade work on these flock material ??..Thanks