A table tennis blade usually consist of several layers (exception: 1-ply Hinoki blades, e.g. Senkoh 90). The reversed gluing technique gives the blade its stability. Depending on the different woods or the combination thereof, the blade varies in its rigidity, hardness and weight. We select only the best quality of woods for our blades. The harder African woods like limba, koto and anegre, are used for the outer layers. Softer woods, for instance, the European pine-tree or African abachi, make up the core layer on the inside, which produces the unique BUTTERFLY feeling. 300 year-old Japanese cypress Kiso is used for our carbon blades giving their outer layers a powerful feeling.
Prior to its market launch, each BUTTERFLY blade has to undergo strict quality control as far as the bending strength and flatness of the surface is concerned. The creative combination of different woods and various thicknesses is the secret of the BUTTERFLY technology. Woods always differ on speed and ball control, which can be classified for each playing strategy.
DEF: Bilateral defence from a far distance; controlled play close to the table
DEF jam: Safe, bilateral defence with regular jamming attacks, preferably from the forehand position
ALL-: Safe chop and block play with rare offensive hitting
ALL: Controlled use of all playing styles
All+: Accurate block and counter hitting with controlled topspins, mostly from the forehand position
OFF-: Variable, spin oriented offensive play, often from a medium distance
OFF: Bilateral offensive play close to the table and spin variations with a direct tempo
OFF+: Direct offensive tempo, preferably close to the table; hard bilateral spin, block and hard hitting
Which blade suits best for you depends on your playing strategy on the one hand and on your ball feeling on the other hand. As mentioned previously in our rubber article, every human has a different sense of touch. The player’s hand perceives the vibration of the blade during ball impact in a different way depending on the person.
Article from : http://www.butterfly.tt/info/products/technology/blades