For the past couple of years I have copied painting and art work using ambient daylight only with black and white reflectors.
I find that a time between 11am and 2pm to be best. Depending on the surface material or support, I try to get an angle of light to suite, the lower the angle the more texture. I only use filters when necessary.
Contrary to the above, I have used Velvia for both colour and black and white copy work, getting first class results. However, I do all my own processing so can make allowances as necessary. For equipment I use a Sinar P 5X4 with a Blad. rear panel. and primary lenses only.