an insight!

I was taught to use only a portion of the bow hair as I drew it over the strings...and this was by a classical musician. In experimenting with playing with all of the hair as compared to tilting the bow slightly and catching approximately 1/2 to 3/4s, I've found that there's a little more harshness to the tone...it seems that it becomes a little more scratchy too. When playing with a slightly tilted bow, it seems to tone down the overall tone....and offers more pleasantness to the tone. Maybe it's my violin...not sure why.