I've been using the instructions from A. K.'s book for prepping my quills with good results. After burning the fibers from the quills in the bleach/water solution, they need to be soaked in a solution of water and baking soda to neutalize the effects of the bleach on the quills. The type of hackle used for the quills makes a big difference in the end results. I haven't been able to find strung chinese neck hackle so I have been buying chinese rooster necks (very inexpensive) and plucking the desired size from them.
Steve

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"If there are no dogs in Heaven, then when I die I want to go where they went"-Will Rogers