I do wash all but my 30's & Civil War prints. I like the antique, crinkly look after they are quilted then washed. I have had a few quilts with dk blue, red, dk green and black that yes they did fade onto white fabric in the quilts. SO I learned to wash before using. And it was high priced Quilt fabric! I had some dk green that was washed twice and it still bled or rubbed off onto the leaders of our LA.