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A good dense synthetic brush must comes with a perfect balance loft height, backbone and splay. When the loft is too short it's becomes very springy and doesn't splay very well the backbone is too strong, if the loft height is too long becomes very floppy and it's splay too quickly and looses it's backbone.
It's not very easy to find the perfect dense synthetic brush straight away, because you have to buy them until you've find out the perfect synthetic brush as YMMV.
I have two perfect synthetic brush for face and bowl lathering in my den which are:-
The RazoRock Plissoft (Bruce handle) 24/57mm knot and the Edward Jagger (EJ28) v2.0 Silvertip Fibre in Faux Horn handle 25/58mm knot.
I'm pretty sure the RazoRock Plissoft Beehive handle 28/57mm knot would be excellent as well, I haven't tried it yet.
Really well said.
From my experience if a synth knot is really dense, it could mean the glue bump has been set too high, and the face feel of a brush with a very high glue bump is not the pleasing thing.
I find the synthetic loft set 52mm is too springy for me when I tried to face lather, when I cannot get a normal balance splay using the tips of the synthetic brush.The only way to have density and splay with a synthetic is to set the loft at about 52mm and have zero glue bump above the handle.
I find the synthetic loft set 52mm is too springy for me when I tried to face lather, when I cannot get a normal balance splay using the tips of the synthetic brush.
Yup, exactly!
A "dense" synthetic generally means a high glue bump and they are quite horrible!
A badger behaves very differently so even a low loft allows it to splay naturally whilst providing good backbone.
The splay/backbone characteristics of synthetics are not comparable to natural hair brushes.
The only way to have density and splay with a synthetic is to set the loft at about 52mm and have zero glue bump above the handle. I have yet to use a synthetic like this, and I have nearly 50 of them!
Despite synthetics not being able to match the splay/density metrics of natural hair brushes, they are still the best at making lather for me.
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